I quite like it, but I have a lot of it, and I'm not going to rig results to try to get a good response from others, to be honest. Also, I didn't actually know of St. Anger's existence until after I'd listened to most of the other stuff (Black Album, Ride the Lightning, Master of Puppets, ...And Justice for all, and Death Magnetic).
Song: Sun and Steel
Artist: Iron Maiden
Album: Piece of Mind
Via: iTunes