I notice the way the man carries himself.
I like a man who wears clothes that actually FIT him and who doesn't think he's something he's not.
Like those wannabe "gangstahs." They aren't in any actual gangs, but they walk around like they got one leg shorter than the other, wearing clothes 5 times too big, talking like they have marshmallows in their cheeks. Instant turnoff.
The second thing I notice is how he treats the people around him. Is he controlling or does he respect the feelings and boundaries of others? Is his sense of humor actually funny or does it come at the expense of others?
I find these things important because it usually is a pretty good indication of how he will treat me. If he walks around like he thinks he's hot shit every day, he usually thinks he's hot shit in a relationship. If he cares about how he treats others and takes care of himself, he is more conscious of my feelings and is more open to communication.