Studies have shown that beautiful/handsome people have more success in life. We assosicate beauty with intelligence, ability, kindness and a host of positive qualities. It is not right, but it is human.
Another perception is that beautiful women get a lot of men asking them out. I am told this is not true. Men assume that they would not have a chance with a very beautiful woman, so they don't ask them out.
The only negative qualities I have personally heard of about beautiful people is that they are full of themselves. This is not true; most good looking people are like most people: nice. Darn, I forgot what the second thing was.
Richard