Metal. (heavy,symphonic,instrumental,industrial?)System of a down,apocalyptica,symphony x, Rammstein,Korn,MSI,Alexisonfire, Slipknot,Lamb of God to name a few..
Rock.(Some classic,modern,punk,indie,grunge) Led Zepplin,Metallica,Iron Maiden,Old greenday, We are scientists, Red Hot Chilli Peppers,Nirvana...
Techno.(hardstyle,dubstep,house,chiptune[Not nintendocore although some of it is decent]) Nullsleep,SOS and Phear Phace, Mt Eden,Deadmau5,Skrillex,Foreign Beggars, Datsik,Flux Pavillion,Arion,Pedulum and the odd random techno artist that i only have one song by.
I'm pretty sure I'm forgetting at least 100 more though..
Also several game soundtracks.