I just get this vibe he's mean, entitled, snobby, and makes fun of others. I physically have a difficult time looking at his face. It's rare when I get that feeling, but whenever I have the same vibe with other public figures, I'm eventually proved right.
eta: I don't even feel that strongly about the Kardashians, Honey Boo Boo, Snookie and I know they turn off a lot of people. There's just something about Justin, but I can't put my finger on it.