Hmmm....... I listen to a lot of Halo theme music....

However, I also like "My Chemical Romance - The Black Parade", the "Gorillaz - Feeling Good Inc." They are my only main favorites so far.

Feeling Good Inc.: http://youtube.com/watch?v=eH1UmMu3R7o

The Black Parade: http://youtube.com/watch?v=9Y_2aTHGPKE