While metal isn't my preferred genre of music, I did have a coworker who would blast it at work. It was good background music for while writing code as I didn't have any interest in the lyrics as I couldn't understand them. That's positive, right?
So, totally switching gears here, Rockstar needs to bring back Red Dead Revolver (Redemption is pretty great, but Revolver was a different animal that I crave more of). Here's the main theme. The whole soundtrack is a great ode to spaghetti westerns IMHO.