He is a classless bastard.
Wholeheartedly agree. He's a "take the good with the bad" kinda guy. Like people have said, he's poured money and passion into the Mavs where there was none before, but he's made the whole team about himself.
I hate the Mavs, and Mark Cuban is probably a big reason why. I tend to see them as bitter, wild, and undisciplined, and that's all a product of Cuban. Cuban makes classless disparaging comments about other teams, and seems to allow his players to do likewise (Nowitzki has come of as a whiner the past two seasons in their big time playoff losses). Because in recent years the team and the players have gotten so much better (maybe a product of Avery Johnson), but that image remains due to their owner.