It seems to me that those people with whom I don't naturally get along are more bad looking than those who I think are nice people, in general, with exceptions of course.
Traits to be considered: nose shape, eyes, micro expressions, some skin qualities (ex. how much bloody is the skin or pale), facial format. Those are physical traits that aren't specifically very telling of how much beautiful someone is (I think lol).

I don't know if you get my point. But this is something that has been passing through my mind for some time.