Out of all of them, I'd have to go with Joe. He at least has a sense of humour, and I need guys to make me laugh. But I don't like what he did to Taylor Swift. xP
I hate all of them, but if I had to pick, Kevin because I feel like he doesn't get recognized enough. xD No one likes poor Kevin. Plus, he's the only one in the band that doesn't sing and the other 2 are horrendous singers.