Meh. As a person who's generally pretty asexual(there are exceptions for really hot men or women), I can't really help. I notice what looks nice on a person, what I find pretty(read: sparkly jewelry) and other than that, I kinda ignore them. I definitely lean more towards liking pretty things on women, though. Men, eh. The problem is that I like colors and sparklies and looking neat and coordinated. Professional, like. A lot of guys have boring professional wear or just look sloppy and ill-put-together to me, so I have to agree with you. I do think that it's a lot to do with our society and stereotypes that butch lesbians are, well, butch. A lot to do with our society, some to do with stereotypes, some with breaking out against rules set for women(especially if they had family members who were very lady-like and/or submissive to their husbands) and probably some other things.

*shrug* I generally dress in girl clothes, because they have prettier things and I really like those kind of things (*cough*dragoninpastlife*cough*). I wear guy jeans, but that's only because I prefer the larger pockets in guy jeans. Plus, with jeans it's hard to tell if they were made for guys or girls. ^__^