idk
hardcore (80s stuff like black flag, minor threat etc)
emo (indian summer, still life, navio forge...)
screamo (saetia, spirit of versailles, envy, la quiete etc..)
post-emo (early sunny day real estate, christie front drive, knapsack)
pop-punk/melodic hardcore (lifetime, hot water music, early saves the day)
indie pop (rilo kiley, saturday looks good to me, heavenly, the postmarks etc)
indie rock (this is a ridiculous wide category but idk sonic youth, early weezer, pavement etc)
shoegaze (my bloody valentine, slowdive..)
60s ye-ye (francoise hardy, france gall, chantal goya..)
post-rock (mostly early stuff - later talk talk, bark psychosis, tortoise, though i like some newer stuff like godspeed you! black emperor and neil on impression)
jazz (a love supreme and later coltrane, sun ra, ornette coleman, fusion-era davis, etc)
that postrock/hardcore genre that people are calling "post-metal" but i refuse to call it that so lets just say "bands that sound like isis"
prog rock (king crimson, camel, area..)
idm (autechre, aphex twin, squarepusher etc)
other experimental electronic music/ambient (aoki takamasa, maeror tri, fennesz etc..)
noise (masonna, merzbow, mlehst, etc..)
krautrock (can, neu!, harmonia etc..)
dubstep (burial, digital mystikz, boxcutter)
post-punk (this heat, mission of burma, wire, etc)
"post-hardcore" (which isnt a real genre but still) (fugazi, drive like jehu, at the drive in)
neofolk (current 93, death in june, sol invictus) (jk sol invictus suck huge dicks)
assorted avant-garde/free improv (keiji fucking haino, etc)
a lil romantic-era classical (brahms, beethoven etc)
some modern composition shitz (glass, xenakis and whatever)
idk probably more im forgetting