I can't stand Nickelback or Creed, their brand of generic post-grunge shit doesn't deserve any praise because every song sounds like the last and none of them are particularly talented at what they do.
I despise Limp Bizkit, I just don't get what's so good about some wannabe rapping shite lyrics over a repetitive and rather irritating guitar riff.
The Sex Pistols are another band that just don't mean shit to me. They were just cartoon-punk managed by a blithering idiot who didn't know the slightest about music and their songs are just generic pseudo-anarchic shit, plus none of them could even play their instruments and Sid Vicious only played bass on one song on Never Mind The Bollocks.
Coldplay, don't even go there, just a whiny annoying high-pitched scum with boring chord progressions, boring tempos, mediocre lyrics etc.
I just can't listen to UB40. Most of their songs are just 'reggae' (not real reggae) covers of older songs, and they consider themselves reggae when they just don't have the emotion in their music.