No Metallica/Megadeth? I'm surprised.
Since I play guitar, there's nothing quite like good ole 80's thrash metal:
Holy Wars - Megadeth
Tornado of Souls - Megadeth
Hangar 18 - Megadeth
Peace Sells - Megadeth
Disposable Heroes - Metallica
Dyer's Eve - Metallica
Fight Fire With Fire - Metallica
My favorite has to be Fight Fire With Fire. One of my buddies who just got back from Iraq said his unit would always play it before going out on a patrol. Last year I filled in for my roommate at the college radio station and played it on air. I bet all the hippies' brains exploded that morning lol.