A haughty attitude is the only real deal breaker for me. Not necessarily toward me, but toward people in general.
"If somebody is nice to you, but rude to the waiter, that is not a nice person."
It shows up in the eyes eventually. Younger people, not so much, but the older you get the more a haughty attitude will show up in how your face looks. To me it makes a person look ugly.
I know a lot of people who say that certain people look hot, but to me they look ugly because they look haught.