I think I'm a lot like Michael. I don't think I've even identified with a fictional character as much as with him.
Just like him, I'm egoistical, tend to alientate and push away people around me, tend to be sarcastic and look down on others, have slight anger issues (just instead of going around breaking houses and beating people, I just get irritated a lot, complain for no reason and generally act like a passive-aggresive assh*ole), like to rummage through my psyche, escape from reality to fantasy through video games, films etc. and I'm trying to find something to do in life, that would be worthwhile, contribution to those around me and would make me happy.
It's kind of scary that instead of "good guys doing bad things" like CJ, Niko or Johnny, first GTA protagonist I truly identified with was really not a good person.