Oh theres so many..... well i pretty much hate the things that started around 1998 and later....however the stuff between 1990 and 1998 is some of my favorite....being that i am a teenager, my nostalgic feelings take me back only to the mid 90s.
My absolute favorites are (in order [sorta]):
Nirvana
Sublime
Incubus
Santana
Green Day
System Of A Down
Offspring
Red Hot Chili Peppers
And then a bunch of other ones i enjoy listening to are:
Metallica, Linkin Park, Muse, Alice In, Chains, Foo Fighters, Slightly Stoopid, Fastball, Soul Asylum, Deep Purple, Led Zeppelin, Modest Mouse, Wookiefoot, AC/DC, Cake, Chronic Future, Eve 6, Flogging Molly, Custom, Goo Goo Dolls, Gorillaz, Guns N' Roses, Kenna, Pink Floyd, Skid Row, Weird Al Yankovic, Sum 41
So Basically i like a lot of Rock. I tend to stay away from the harder metal stuff. I like Ska quite a bit, while disliking most Hip Hop/Rap. I despise country. Pop music makes me want to stab things. Cher.....*shivers* well her music actually causes me to feel pain