I hate a lot of people, so this might be a long list.
At #1, as he has been for like 20 years, Michael Jackson. I will never understand the love for this marginally talented DANCER who sings like he's having his balls squeezed in a vice. I can't stand all that "hooo", "hee", and "shamon" bullshit. What the fuck is that? It's sad that Prince's brilliance had to take a backseat to this guy in the 80's because one is a genius while the other got lucky working with Quincy Jones. The whitest R&B music imagineable. And I haven't even mentioned his completely disturbing private existence, trapped in some kind of fantasyland arrested development. Not only would I like to take a swing at him, I'd like to put him in a rocket ship and sent him back to the alien planet he came from, where he can no longer pollute the minds (and bodies) of children around the world.
#2 Liam and Noel Gallagher. Does this need an explanation? These guys are probably the biggest assholes in music, who cares if it's an act? You don't wish AIDS on one of your musical peers just because they come from a higher income bracket. I wouldn't punch them myself, but I'd hold them down while Damon Albarn beat them within an inch of their lives.
#3 Bright Eyes. First of all, who names himself after a Shirley Temple movie? What the fuck is that? And I love how Mr. Indie Emo isn't above dating Hollywood starlets like Winona Ryder. This guy has the whiniest, grating, annoying voice in recent memory, I don't give a shit how good of a songwriter he is. Not Dylan, not even close, never will be. Oh yeah, calling your record label Team Love is the lamest thing I've ever heard in my live. Dipshit.
and the rest in no order...
Chris Martin. Seeing this guy with his long hair cut running around the theatre at the Grammy made me wish I was there so I could have dive tackled him and pummeled him senseless in front of his industry peers. Boring, soulless bullshit.
Henry Rollins. Without sounding like some overly-defensive U2 fan, this guy is the biggest hypocrite in the universe, endorsing whatever bullshit product a company pays him to hawk, appearing in shitty films. All guys whose necks are as thick as their heads need a serious beatdown anyway.
Rob Thomas. If I hear that song Smooth again I'm going to go on a murderous rampage. This mainstream whitebread crap drives me up the wall.
Ted Nugent. See someone else's explanation above. Waste of human life, I hope he gets attacked and killed by wild animals and then eaten.
Adam Levine. Just because. You're not Stevie Wonder, dude. Fuck, you're not even Jamiroquai.
Moby. Hey, could you possibly sell the rights to more of your songs? Oh, you can't, because you sold the rights to ALL of them? Whore.
$ting. See above. It hurts to say this, because he's kind of cool, but not as cool as he thinks he is. You're 50, man, lose the mohawk.
Paul McCartney. Sorry, but someone needs to wipe that stupid grin off his face. And he should be punched out just for writing Honey Pie.
Anyone in FallOut Boy, Linkin Park, Good Charlotte, etc.. Shut up, you whiny suburban white boys.
Plain White T's. You know why.
Weiland from STP. What a douchebag. I can have sympathy for heroin addicts, but I always hated this guy, from his Eddie Vedder rip on Plush to his stupid outfits, hair, make up. Has-beens that some people sadly think were actually an important band in the 90's.
I really hate Aerosmith, Bon Jovi, and Dave Matthews Band with a passion, but they all seem kind of like nice guys, so I can't say I want to take a shot at any of them. But I'd love to rip that frog out of Dave's throat so he can maybe sing properly.