I hate these so much, they piss me off: Nickelback, Linkin Park, Justin Beiber, Fun., Matchbox 20, Creed, RHCP anytime after BSSM, Cage the Elephant (His voice makes me want to rupture my own eardrums). There are more, but these are the ones I hate the most.
Nolite te bastardes carborundorum.