No, not too much into my appearance or other's appearances. I took the SLOAN ( big 5 ) in 2009 here at PerC. I came up as RCUEX. I'll post the results to show many parts of results have to do with *appearance* & I don't give much thought to appearances. What is inside is important, to me. I haven't worn make-up for years.
http://personalitycafe.com/whats-my-personality-type/2820-sloan-personality-typing.html
Some of this SLOAN stuff is bang on! Some bang off tho. I might reTest just to see if there are any changes.
Global 5: sloan RCUEN; sloan+ |R|cuEx; primary Reserved; R(76%)C(66%)U(60%)E(68%)X(50%)
Updated 2012: R(82%)C(78%)U(72%)E(66%)I(54%)
Reserved
outsider, does not fit in most places, does not mind going days without speaking to people, does not like night life and crowds, not self expressive, spends more time in solitary activity than group activity, does not compete for the spotlight, fears getting involved with others, not seductive, dresses to avoid standing out, not impulsive, loner, female introverts tend not to like wearing makeup, does not enjoy leadership, not very sexual, more likely to be nerdy, prefers loose fitting clothing, inhibited, suspicious, tattoo averse, unmotivated, can't do anything when they don't fee good, has trouble speaking when emotional, dislikes compliments, desires security and support, does not like accepting help, more visual than verbal, does not want to be famous, likes science fiction, prefers to stick with things they know, not traditional
RCUEN
not easily hurt, does not need things to add up perfectly, keeps emotions under control, spends more time in solitary activities than group activities, when ending an association - tends to stop all communication without explanation, does not readily admit mistakes, underachiever, not known for generosity, level emotions, does not care what people think, does not fit in, more logical than abstract, does not value tradition, uninterested in leadership, not impressionable, not prone to envy, values money over acceptance, not open about feelings, unproductive, values solitude, not very happy, pessimistic, plain appearance, inflexible, won't do much to avoid rejection, not afraid of doing the wrong thing, underachiever, does not accept people as they are, unable to stand up for self, slow to forgive, not that interested in others, does not care about image, not prone to giving compliments, rarely prepared, quiet around strangers, does not like touchy feely people, avoids responsibilities, avoids difficult reading material, rarely reinvents self, does not like to lead, not prone to worrying
I just took that out of curiosity - I scored:
RCUAI
avoidant, often late, patient, rarely prepared, non-aggressive, slow to judge others, withdrawn, unconcerned with image, relaxed, avoids crowds, easy going, not demanding, low maintenance, unambitious, not domineering, private, thinks before acting, concerned with the feelings of others, not wild and crazy, not controlling, does not like to show anger, hard to offend, dislikes the spotlight, uninterested in leading, not competitive, overly nice, not physically affectionate with most people, not bothered by disorder, level emotions, does not second guess self, agnostic/atheistic tendencies, not picky about food, not relationship obsessed, unproductive, unimposing, plain in appearance, disorganized, loner, lower energy level, very curious, uninterested in prestige/fame, not superficial, likes difficult reading material, does not get worked up about most things, fearless, flexible, trusting, does not stick to plans, easily distracted, interested in science, unconcerned that people have trouble reading them, a good loser, modest, not swayed by emotions
However, I am not plain in appearance, and avoid looking "plain" at all costs. I am concerned with image (my own, not that much that of others), but like you, I care for what's deep down in the individual (I don't find any conflict between having a "good" image as long as it matches who you are, and is not "fake"-to me, wearing makeup doesn't qualify as necessarily fake, but not to you, and this is OK!)
I would be fake if I would be "normal", because even though everybody is different, I am not really at peace at wearing "I am normal" logos on my wardrobe (I.E. looking "plain.") I must "shine", even if such glow is not aasthetically pleasing to many in society. I like to look like myself, but that is not plain, because I do not consider myself plain inside, but rather complex and hard to pinpoint/understand. Thus my image often is a mirror of these qualities, and my continuous personal growth and values. It's hard to understand unless you are me, and I am sure many would consider myself vain, even though in my heart, I am nothing of the sort, as much as I love to look "great" (as far as I define the term); not "normal" or "plain."
Note that I scored Global 5: sloan
RCUAI; sloan+ rCu|A|i; primary
Accommodating; R(66%)C(68%)U(66%)A(80%)I(56%); this is why I believe I confuse all enneagram test results (and why it hasn't me convinced so much)-I am VERY accomodating (I used to be even more in the past, to my own detriment, but those days are gone, as I deserve to love myself as much as I do others), but I am also very self-oriented, caring for my image as a medium of self-expression, which not even the "Big 5" test is giving me credit for.

The Enneagram usually places me 2 or 4. I think I am 4w5 according to their descriptions (the tests have yet to convince me), but I need to revisit them again. (Another piece of the puzzle is that I used not to care that much for my image until a few years ago, although I never really enjoyed looking "sloppy".)
Perhaps no personality test is right on its own yet, many of them having elements of the "final truth"-humans are too complex to easily and accurately measure who they really are.
I am sorry if the above seems like if I was trying to counter you in anyway-what I was really saying is that even though I am supposed to look "plain" according to another personality test, I still care a lot about my own image, although I still do not consider it to be unhealthy vanity, or inherent shallowness.