I have heard a professor of psychology speaking about it at a university and he said based on studies, women are visually attracted to men who have good symmetry (both sides of face are an exact match, no uneven ears or lazy eyes, etc..). And men are attracted to women who have (I forget the word he used).. basically he said women who have a young-looking face.
This is so weird to me because I've always liked quirks... A tooth that's at a different angle, a nose that someone might say is supposedly big or long, freckles, ears that stick out, a crooked smile... Some feature that's really unique.
I used to have a tooth that was noticeably longer, but just on one side -- kind of like a lopsided vampire, I guess. I had actually really liked that, as I thought it was quirky, but it eventually broke off to be even with my other teeth. If it wouldn't have been so expensive, I would have had it restored to its original length.
So I tend to like things that are a little off-kilter in other people's looks too...
But maybe I'm just weird.