all kinds of metal/rock realy. not anything specific beyond that 
Whatever is in my WinAmp playlist or my Last.fm 'personal' or 'mix' radio. I've been letting last.fm track my listening habits for several years now so my radio gives me a pretty good mix of favorites- past, present and all-time.
Top 100 according to Last in the spoiler ...
KMFDM. What better music to listen to while doing industrial stuff than industrial?
EDIT: Saw saul_goodes list, damn what a collection man! Doubleplus good! OCremix has some good music to accompany games, favoring armored core tribute album atm.
Gah, who needs external music when you got C418
Usually I don't listen to music but have something playing (youtube vid I downloaded, actual tv show, etc..) on the home theater machine to my left.
however when there's nothing like that I turn to rockradio1 (streaming internet station)
listening to C418, the old skool radio, or some wubstep 
Mostly rock, metal and punk:
B182, Sum41, Foo Fightersm, Rise Against, Skillet, BFMV, etc)
Orchestral music too:
Mostly use it for filmmaking (Think X-ray Dog, Two Steps from Hell, Audiomachine, West-One and immediate music)
Some undefined other music. No direct dislike/like of anything actually.
Hmm,
QuoteEspecially whilst flying/battling hordes of enemies, it seems to match the atmosphere of the game.
Nothing beats pure PvP action with this kind off in the background: (Ol'brick days)
http://www.youtube.com/watch?v=VdXRK4KcSSs
Pretty much metal and rock, occasionally something that is playing in
the radio. Also some music that is pretty much undefined and even C418
in minecraft if i happed to get a record somewhere. Quite a lot of stuff
from Saul_Goodes list actually.
Off topic:
Something similar which is 10 years older and better: Surprise. Propably the only game that I have yet played more than minecraft. Bought it for 8€ 9 years ago and it killed my processor.And the game still works 
.
