i agree that there is some variability by the major. i hang out with those in arts and humanity most often. many of the art students are fashionable in their own ways. i like those who have their own styles. one of my best friends often dyes and cuts cloths. i love going shopping with him. those in the film major also tend to be pretty fashionable.
i also feel that there's some variability by the country where you are from. if you take an average, i feel that european guys dress more nicely compared to local american guys. japanese guys also tend to be more fashionable and more girlish in their tastes, i would say. european and japanese guys seem to wear perfume more often than american guys. indian guys tend to dress cleanly.
oh, i have a german friend who always wears a clean pressed shirt and neat pants. he does not wear a tie, but i could very much imagine his doing so even on campus. he is a grad student in management. i heard that MBA students have to dress up to some extent, but he really stands out for his formalty. he doesnt like american casuality and it seems to be something to do with his upbringing as well. but he is rather a rare exception.
i buy all my cloths from japan and i like cloths that are clean/neat, delicate, girlish, and feminine. but i think that there are some cultural differences in styles because i cannot find these kinds of cloths in the US very often. urban outfitters may be the closest in their detailedness and girlishness though. i feel that the american fashion tends be more dynamic and either more sexy or more casual. i like delicate styles that have lovely little details.
what i do not understand about some of american college girls is that some of them wear extremely sexy cloths and high heels at parties, and then they go back to the usual university sweatshirt, jeans, and beach sandals at school next day. sure, different cloths serve for different purposes. but i find this gap rather interesting, as i myself feel that fashion is like a part of everyday life.
but some of them are really cool at casual styles with jeans and sandals in comfortably relaxed ways, which i love to see.
finally, i had a german female friend who always wore very mature, sophisticated, tasteful cloths that I'd barely see either in japan or in the US. Shall i describe it as understated european style? her mom was an artist, which may explain a part of it. it went so well with her because she was very very tall and had a very mature face. unlike the american fashion trends, understated beauty is valued a lot in japanese fashion as well, but maturity is not so much. so i thought it really nice.
sorry i am kind of lost. i was trying to make the point that fashion seems to vary by the country where you are from as much as by the school major.