I don't listen to some bands or like them particularly but it doesn't mean I don't respect them for their contribution to the good music today. I.e. Nirvana, Heart, The Beatles, etc.
Hell, even Linkin Park was awesome, up until their third album. That's where they tanked hard.
This, the only people I hate are a lot of rappers that only talk about women, love, etc and their raps have no meaning beyond that. I hate all the Dubstep I've listened to, I can't stand the sound of it. Country, pop, rap, etc, I am fine with as long as the song server a purpose other than making money.