Anything by Alestorm - Particular favorites are "Wolves of the sea" "Huntmaster" and "Wenches and Mead" for awesome Scottish-based Pirate-Metal. I saw these guys live last year, and it was one of the best mosh pits of my fucking life!
The Command And Conquer Red Alert theme is another favorite of mine, for gratuitous violent tendancies, as is anything by Atreyu, System of a down (or Serj Tankian alone), Coheed and Cambria, Machine Head (specifically the album "The Burning Red"), the Halo soundtracks, Papa Roach (The older stuff), The Orange Box soundtrack is always good, as is the Pirates of the Carribean soundtracks.
I'm also open to Voltaire, and other assorted madness - I have more musics on my external hard drives, but thier not hooked up to the Mac right now, so this is just a short list.
-- WARNINK -- LINK BELOW IZ KNOWN TO CAUZE HEMMORAGE --
I WARNED YOU, DIDN'T I WARN YOU?! BLAME RAYHAWK DAMNIT.