My nominees:
Tom Morello - Hate his playing, hate his politics. If communism is so great why doesn't he move to Cuba?
Tommy Lee, Dave Navarro, Jason Newstead - Thanks for Rock Star Supernova! It was fun to watch you humiliate yourselves on national television!
Eddie Vedder - He hates being famous, maybe he should quit music.
Fred Durst - Holy crap where do you even start with this guy? The epitome of douche-bag. The good news is that he seems to be finally fading into obscurity.
Steve Vai - The Fabio of shred!
Bon Jovi - He's a "Cowboy" and he rides on a "steel horse" and he's "wanted: dead or alive". Give me a fucking break! I hope that his acting career goes well so he can be in movies and tv shows that I will never watch!
Henry Rollins - Speaking of an acting career, this guy sold out a long time ago. His Rollins Band releases suck sweaty donkey balls, and his talk show is watched by 4 people nationally (Did you even know he had one?)
Alexei Laiho - What kickass keyboards in your death metal! Have another drink and break yet another arm!
Randy Blythe (Lamb of God) - I can't even pinpoint why, this guy just seems like a poser.
I agree with all of these but Bon Jovi. I'd add Billy Corgan to this list.
Had to make an edit to say that I forgive Gilby Clarke for Rock Star Supernova as he seemed embarrassed/disinterested in it when I watched, thus he was the only one in the "band" I could relate to.