Coincidentally, I discovered just a few days ago that I have a serious bias towards physical attractiveness in women.
If I'm sitting next to a woman at a bookstore or in a train or something, beauty completely determines whether I want to start a conversation with her. I think it's because of a desire for physical intimacy that I've been ignoring. It comes out in the form of subconsciously judging someone by their looks as a gauge of whether they're worth talking to. And so, I end up being friends with women that I'm afraid of developing a crush on. When it'd be easier to just develop friendships with women I'm not attracted to. Okay, that's kind of going off-topic.
I don't really have this bias when it comes to men, though. Probably because I'm straight.
I don't really care about my innate appearance, it's more about grooming. It's probably because I rarely, if ever, have had anyone outside family tell me I'm handsome or ugly.