Almost anyone who has sung the National Anthem before a World Series/Superbowl game. They've taken the whole point of the exercise away.
Music is such a deeply personal thing that I'm reluctant to use the term "hate" cause you're really messing with other people... however, I fail to see the beauty in calling women bitches and 'hoes or rhyming suck, fuck, duck, buck... I've grown very tired of a the overly emotional... sort of started with Gary Puckett and the Union Gap, Phil whathisname, and the woman who can't stay off of dope or away from Bobbie Brown... the kind of person that wins American Idol...
In reality I'm not much of a commentator on pop music as I stopped listening to it about the time of Hotel California. I spend my time with Oscar Peterson, Milt Jackson, Myles Davis and the incredible Ella Fitzgerald. To me, they're what "rocks" and half of them are dead.