cw8: I listen to music, namely from the 70s-90s, most of the time in the background unless the in-game music is excellent.
When I raided in vanilla WoW back in 2006, I played Rhapsody of Fire's music, e.g. Emerald Sword. It kept you going after dying at 3% after fighting the same boss for like 20 mins every encounter, every weekday night for a week or so.
Now I listen to Dawn of Victory also by Rhapsody when playing Hearts of Iron 3 as the Allies trying to destroy the Axis powers. Particularly epic, though the HOI's music soundtrack is already epic.
Their songs are all awesome for fantasy/RPG games etc.
Hammerfall: I like your style :)
Hehe, hearing "Gloria, Gloria, Perpetua" from Dawn of Victory while marching into WWII Tokyo and thus ending the Pacific War or Nazi Berlin in Hearts of Iron 3 is beyond epic lol.
Mentalepsy: Heavy metal. For the most part, though, I only do this when playing Everquest 2, because after logging a clearly unhealthy number of hours online, the in-game music and sound effects get just a bit wearisome.
Aye, need some music in WoW, especially when the bosses tell you stuff like:
"Your friends will leave me"
"That my heart will stop"
"That I suck and it'll be all over soon"
"That they'll show me no mercy"
"That I should've stayed home"
"That I'm a morsel"
etc etc etc
over and over and over again for weeks, months to come.