#0 - July 6, 2010, 1:29 p.m.
Anything involving intense tanking: Slayer, Three Days Grace, Disturbed, or Metallica
If something like Gunship that gives you an epic feel, or Onyxia: Dragonforce
Or if you are fighting something big and bad like Anub'arak or Yogg-Saron, I listen to Nightwish.