Without meticulous subcategorization, and in no particular order:
Indie Pop/Rock (Elliott Smith, Spoon, Sufjan Stevens, Interpol)
Death Metal (early Morbid Angel, Suffocation, Cryptopsy, Immolation)
Black Metal - almost exclusively early 90s (Emperor, Immortal, Darkthrone)
Jazz - mostly be-bop, hard bop, and modal (Mingus, Thelonious Monk, Coltrane, Miles Davis)
Hip-Hop (Nas, Wu-Tang, Organized Konfusion, De La Soul, MF DOOM)
Rock (Radiohead, Pearl Jam, Pink Floyd, Jeff Buckley, The Cure, The Flaming Lips)
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"You think I'm spending too much of my time starting up clubs and putting on plays? I should probably be trying harder to score chicks. That's the only thing anybody really cares about."