I listen to anything lyric-less. So classical, movie soundtracks and electronica. I listen to whatever corresponds with the emotion I'm trying to convey. Action sequences require something dramatic, like a requiem (along the lines of songs like O Fortuna). One of my favorite contemporary songs is the Red Cape Tango. Aside from Michael Daugherty being an utter genius, the drama of the piece is perfect for face offs. If you're not familiar, it's from the Metropolis Symphony and is about Superman's face off with Doomsday; simply amazing.
Sorry, I digress. In my experience the best type of music to listen to while writing is music that is not only emotionally charged, but also lyric-less. I emphasize it being lyric-less because the words throw me off. I have a harder time blocking the music out when I need to, and isolating a certain emotion or thought, when someone is singing or rapping. Sometimes the words creep in and I type it out, disrupting my flow. Latin, on the other hand, is okay, because it's just noise to me.
Duel of the Fates is also another recommendation for dramatic music. But, I mean, duh right?