I knew about MBTI for years before I understood enneagram. For some reason I just couldn't wrap my head around it at first, and wasn't that interested. But a good friend, who is also a Psych major, learned about it and kept encouraging me to do the same. I finally bit the bullet and did my research. I figured out my type and a lot of doors opened up for me. It helps explain things that MBTI doesn't really address, since MBTI is more about how we process information, make decisions and interact with the world on a cognitive level. But enneagram goes deeper into self-image, fears, values, common tendencies.
Also, aside from better understanding things about myself, I was able to learn more about other people and other ways of thinking and being. I can find myself trying to adopt behaviors of other types, which I know conflict with my natural inclinations, because I can be a more well-rounded person that way. That makes it different than MBTI; I can try to be more positive and fun-oriented like a Seven, for example. But I can't really force myself into using Ti (I mean, I can try, but it's a lot harder and probably not as useful for me as better developing my own cognitive functions would be).
It seems so confusing and I'm not even sure if it's superior to MBTI. it even seems to be used less.
I'm just wondering if it's worth the effort to try and figure it out, if nothing else I know I'd mostly just be going by what this forum thinks I am.