On this thread, http://personalitycafe.com/enneagra...ersonality-theory-forum/85323-enneagram-type-mbti-type-compared-statistics.html we got a look into some statistics about the most common combinations. From that data, the INxx types give us a decent sample size that likely gives an accurate reflection of what common combinations are. ENxx and ISxx give us a glimpse, and ESxx gives us very little, however. This thread is purely speculative based on what people have observed around them. *Note, having opinion on this thread is fine, but knowing many people and being able to accurately type are more useful.
This is the most recent data I've found on PerC, and I'm not going to compile it, myself haha. Some thoughts:
-Type 6, in my experience, is the most common Enneatype, especially among ISTJs. Nearly 3 times more ISTJs are listed as type 1. I'd predict that ISTJ type 6s are significantly less likely to be interested in typology than the type 1s are. Furthermore, type 6s, in general, are probably the least interested, quantitatively, among all types.
-Small showing of ESTJs. For them, type 3 is higher than 8 and 6. In real life, I've noticed it the other way around. ESTJ type 3s are more attracted to typology, as ESTJ 6s and 8s have "more important things to do.
-IxTx types gravitated towards type 5. While those combinations are common, I do not think nearly 45% of INTPs are actually type 5. Ti and Ne likes to research, and the bias is to want to label themselves as type 5. However, type 5 has more to do with a need to be prepared and researched, in order to quell feelings of anxiety. WHile many INTPs are certainly 5s, I do not think any combination is higher than 30-35%.
-Type 5 is the most common, on the list. Type 5s are also going to be drawn to researching typology. With that in mind, type 5 is NOT the most common type, but it probably is on PerC.
-Only 15% of the tallys were Sensors. Yet, Sensors make up close to 70-75% of the population. This is where a lot of speculation will take place, as we really don't have any reliable data to conclude what the most common Enneagram types are.
-According to most Enneagram experts, Enneatype is hardwired from birth. Because of this, it makes sense that the same correlations will exist throughout the world. Now, it might manifest itself differently throughout the world, and with tritype theory, the 2 fixes can hypothetically be a result of culture as they're nurtured. For example, Italians are stereo-typically passionate. Many people might have type 8, in their tritype, more than other countries, but the same percentage of true type 8s is the same in Italy as it is in the rest of the world. The tritype component is just something to entertain, but I'd say the core type percentages are much more stable.
-From observation, it is easier to type extroverts. My introvert predictions are based more on the chart, while my extrovert predictions are based more on observation.
Now, onto type:
*Note: not all have a definitive most common
ISTJ
Most common: 6w5
2nd: 1w9
Top 5: 5w6, 9w1, 6w7
Somewhat likely: 1w2, 2w1, 5w4, 9w8, 8w9.
Least likely: 3, 4, 7.
ISFJ
Top 5: 2w1, 9w1, 6w5, 6w7, 1w9
Somewhat likely: 5, 4, 2w3, 9w8, 1w2
Least likely: 3, 7, 8
ISTP
Most common: 6w5
Top 5: 5, 6w7, 7, 9w8
Somewhat likely: 4w5, 8w7, 3w4, 9w1, 4w3, 8w9
Least likely: 1, 2
ISFP (IxFPs seem to be the most diverse, perhaps as Fi is the dominant function)
Most common: 4w3
Top 5: 2w1, 5w6, 6, 7w6, 9
Somewhat likely: 1w9, 2w3, 8w9
Least likely: 1w2, 3, 7w8, 8w7
INTJ
Most common: 5w6
Top 5: 1, 3w4, 5w4, 6
Somewhat likely: 3w2, 4w5, 8, 9
Least likely: 2, 7
INTP
Most common: 5w6
2nd: 7w6
Top 5: 5w4, 6, 9
Somewhat likely: 3, 4w5, 7w8
Least likely: 1, 2, 4w3, 8
INFJ
Top 5: 1w9, 2w1, 4w5, 5w4, 9w1
Somewhat likely: 1w2, 2w3, 4w3, 5w6, 6, 7w6, 8w9, 9w8
Least likely: 3, 7w8, 8w7
INFP
Most common: 4w5
Top 5: 2, 6w7, 7w6, 9w1
Somewhat likely: 4w3, 5, 6w5, 8w9, 9w8
Least likely: 1, 3, 7w8, 8w7
ESTJ
Most common: 8w9
2nd: 6w5
Top 5: 1w2, 3, 8w7
Somewhat likely: 5w6, 6w7, 7, 1w9
Least likely: 2, 4, 5w4, 9
ESFJ
Most common: 2w3
Top 5: 3w2, 4w3, 6w7, 7w6
Somewhat likely: 1w2, 2w1, 3w4, 6w5, 8w9, 9
Least likely: 1w9, 4w5, 5, 7w8, 8w7
ESTP
Most common: 7w6
Top 5: 3, 6, 7w8, 8w7
Somewhat likely: 1w9, 4w3, 5w6, 9w8
Least likely: 1w2, 4w5, 5w4, 8w9, 9w1
ESFP
Most common: 7w6
Top 5: 2w3, 4w3, 6w7, 8w9
Somewhat likely: 2w1, 3w4 4w5, 6w5, 7w8, 8w7, 9w8
Least likely: 1, 3w2, 4w5, 5, 9w1
ENTJ
Most common: 3w4
2nd: 8w9
Top 5: 3w2, 6w5, 8w7
Somewhat likely: 1, 4w3, 5w6, 6w7, 7w8
Least likely: 2, 4w5, 5w4, 7w6, 9
ENTP
Most common: 7w6
Top 5: 3, 6w7, 7w8, 8w7
Somewhat likely: 2w3, 4w5, 5, 6w5, 9w8
Least likely: 1, 2w1, 4w3, 8w9, 9w1
ENFJ
Most common: 2w3
2nd: 3w2
Top 5: 1w2, 7w6, 8w9
Somewhat likely: 3w4, 4, 6w7, 8w7, 9
Least likely: 1w9, 2w1, 5, 6w5, 7w8
ENFP
Most common: 7w6
Top 5: 2w3, 4, 6w7, 8w9
Somewhat likely: 2w1, 3, 6w5, 7w8, 8w7, 9
Least likely: 1, 5
Top 10 Most common Combinations (By number):
1. ESFJ 2w3
2. ISTJ 6w5
3. ESTJ 8w9
4. ESTP 7w6
5. ISTP 6w5
6. ISFJ 2w1
7. ISFP 4w3
8. ESFP 7w6
9. ISTJ 1w9
10. ESTJ 6w5
Thoughts?

This is the most recent data I've found on PerC, and I'm not going to compile it, myself haha. Some thoughts:
-Type 6, in my experience, is the most common Enneatype, especially among ISTJs. Nearly 3 times more ISTJs are listed as type 1. I'd predict that ISTJ type 6s are significantly less likely to be interested in typology than the type 1s are. Furthermore, type 6s, in general, are probably the least interested, quantitatively, among all types.
-Small showing of ESTJs. For them, type 3 is higher than 8 and 6. In real life, I've noticed it the other way around. ESTJ type 3s are more attracted to typology, as ESTJ 6s and 8s have "more important things to do.
-IxTx types gravitated towards type 5. While those combinations are common, I do not think nearly 45% of INTPs are actually type 5. Ti and Ne likes to research, and the bias is to want to label themselves as type 5. However, type 5 has more to do with a need to be prepared and researched, in order to quell feelings of anxiety. WHile many INTPs are certainly 5s, I do not think any combination is higher than 30-35%.
-Type 5 is the most common, on the list. Type 5s are also going to be drawn to researching typology. With that in mind, type 5 is NOT the most common type, but it probably is on PerC.
-Only 15% of the tallys were Sensors. Yet, Sensors make up close to 70-75% of the population. This is where a lot of speculation will take place, as we really don't have any reliable data to conclude what the most common Enneagram types are.
-According to most Enneagram experts, Enneatype is hardwired from birth. Because of this, it makes sense that the same correlations will exist throughout the world. Now, it might manifest itself differently throughout the world, and with tritype theory, the 2 fixes can hypothetically be a result of culture as they're nurtured. For example, Italians are stereo-typically passionate. Many people might have type 8, in their tritype, more than other countries, but the same percentage of true type 8s is the same in Italy as it is in the rest of the world. The tritype component is just something to entertain, but I'd say the core type percentages are much more stable.
-From observation, it is easier to type extroverts. My introvert predictions are based more on the chart, while my extrovert predictions are based more on observation.
Now, onto type:
*Note: not all have a definitive most common
ISTJ
Most common: 6w5
2nd: 1w9
Top 5: 5w6, 9w1, 6w7
Somewhat likely: 1w2, 2w1, 5w4, 9w8, 8w9.
Least likely: 3, 4, 7.
ISFJ
Top 5: 2w1, 9w1, 6w5, 6w7, 1w9
Somewhat likely: 5, 4, 2w3, 9w8, 1w2
Least likely: 3, 7, 8
ISTP
Most common: 6w5
Top 5: 5, 6w7, 7, 9w8
Somewhat likely: 4w5, 8w7, 3w4, 9w1, 4w3, 8w9
Least likely: 1, 2
ISFP (IxFPs seem to be the most diverse, perhaps as Fi is the dominant function)
Most common: 4w3
Top 5: 2w1, 5w6, 6, 7w6, 9
Somewhat likely: 1w9, 2w3, 8w9
Least likely: 1w2, 3, 7w8, 8w7
INTJ
Most common: 5w6
Top 5: 1, 3w4, 5w4, 6
Somewhat likely: 3w2, 4w5, 8, 9
Least likely: 2, 7
INTP
Most common: 5w6
2nd: 7w6
Top 5: 5w4, 6, 9
Somewhat likely: 3, 4w5, 7w8
Least likely: 1, 2, 4w3, 8
INFJ
Top 5: 1w9, 2w1, 4w5, 5w4, 9w1
Somewhat likely: 1w2, 2w3, 4w3, 5w6, 6, 7w6, 8w9, 9w8
Least likely: 3, 7w8, 8w7
INFP
Most common: 4w5
Top 5: 2, 6w7, 7w6, 9w1
Somewhat likely: 4w3, 5, 6w5, 8w9, 9w8
Least likely: 1, 3, 7w8, 8w7
ESTJ
Most common: 8w9
2nd: 6w5
Top 5: 1w2, 3, 8w7
Somewhat likely: 5w6, 6w7, 7, 1w9
Least likely: 2, 4, 5w4, 9
ESFJ
Most common: 2w3
Top 5: 3w2, 4w3, 6w7, 7w6
Somewhat likely: 1w2, 2w1, 3w4, 6w5, 8w9, 9
Least likely: 1w9, 4w5, 5, 7w8, 8w7
ESTP
Most common: 7w6
Top 5: 3, 6, 7w8, 8w7
Somewhat likely: 1w9, 4w3, 5w6, 9w8
Least likely: 1w2, 4w5, 5w4, 8w9, 9w1
ESFP
Most common: 7w6
Top 5: 2w3, 4w3, 6w7, 8w9
Somewhat likely: 2w1, 3w4 4w5, 6w5, 7w8, 8w7, 9w8
Least likely: 1, 3w2, 4w5, 5, 9w1
ENTJ
Most common: 3w4
2nd: 8w9
Top 5: 3w2, 6w5, 8w7
Somewhat likely: 1, 4w3, 5w6, 6w7, 7w8
Least likely: 2, 4w5, 5w4, 7w6, 9
ENTP
Most common: 7w6
Top 5: 3, 6w7, 7w8, 8w7
Somewhat likely: 2w3, 4w5, 5, 6w5, 9w8
Least likely: 1, 2w1, 4w3, 8w9, 9w1
ENFJ
Most common: 2w3
2nd: 3w2
Top 5: 1w2, 7w6, 8w9
Somewhat likely: 3w4, 4, 6w7, 8w7, 9
Least likely: 1w9, 2w1, 5, 6w5, 7w8
ENFP
Most common: 7w6
Top 5: 2w3, 4, 6w7, 8w9
Somewhat likely: 2w1, 3, 6w5, 7w8, 8w7, 9
Least likely: 1, 5
Top 10 Most common Combinations (By number):
1. ESFJ 2w3
2. ISTJ 6w5
3. ESTJ 8w9
4. ESTP 7w6
5. ISTP 6w5
6. ISFJ 2w1
7. ISFP 4w3
8. ESFP 7w6
9. ISTJ 1w9
10. ESTJ 6w5
Thoughts?