I think the "look at me look at me!" attitude is worse than the "I'm too good for you" attitude... the second at least has confidence, the first is just a looser....
Hands down, stale/bad breath. I don't care what he's wearing, I don't care if he sweated his ass off all day and hasn't showered yet, I don't care if his hair is a mess or his feet are cold but I simply cannot STAND unbrushed teeth.