He's awesome, a mercenary seeking redemption, and knocked up the girl who is the daughter of that guy who was bit by his former partner/co-merc.
She witnessed the whole thing, forgave him, dude trained her to fight and be a badass herself, fought the killer of his girlfriend's dad, and sliced his face off.
And he wears white, so bad guys can see him coming. Take that, Ultimate Spider-Man for making fun of MK wearing all white on New York rooftops, mocking allowing everyone to see him.
That's a small part of what I like about the character.
Wonder Girl, I choose you.