Classic rock: Pink Floyd is my all time favorite. But CCR, Zeppelin, Doors, The Who, Hendrix all get generous playtime.
Country: some 70's, 80's and mostly 90's. I don't really listen to anything since 2000. Garth, Alabama, Black, Kenny.
Love 70's rock. ELO, Bee Gees. The Bridge on XM Radio gets great airtime.
Metal: Metallica, Tool, Korn, Godsmack, White Zombie, Sinai Beach, Cannibal Corpse, Cradle of Filth.
Getting into Doom, black and sludge metal lately. Good stuff.
This is hard to listen to but it is very interesting. I think they create music that intentionally imbalances your brain.
I give you Primitive Man.