The only time I rejected a girl was not because she was ugly.
For me, behavior is more important.
Actually, one's inner self determines her beauty. Trust me,
those who knows manner are beautiful and good looking.
I believe there are ugly girls (contrary to many replies in this
topic). Those who knows no manner, greedy, angry, etc are less
attractive.
But this is also depends on your own self. A good person can
only be attracted with another good person. A bad person can be
attracted with both good and bad.