Of course there's more than looks. That doesn't mean that there aren't looks. The bottom line is, braces won't affect them much. If you ask me, people are people, not a collection of aesthetic boxes that are ticked and unticked, or a collection of personality traits. When you find yourself attracted to someone you usually end up thinking that they are much much more than the sum of their teeth/hair/eyes/body/personality/sense of humour (though you still appreciate those). At risk of using a silly word, I'd say that beauty (I mean the kind that's in the eye of the beholder, not Grazia magazine) transcends all of that.
Where were we? Oh yeah, braces are fine.