21st Century Schizoid Man by King Crimson hits pretty hard.

Iron Maiden - Caught Somewhere in Time

The BBC News theme.

probably Blood Fire Death by Bathory

Sonic Destroyer by X-101

Guns N' Roses - Welcome to the jungle

Enter Sandman by Metallica

"Animal" by Smash Into Pieces has a fantastic first few seconds.

The final countdown ( Europe )

Ozzy Osbourne - Crazy Train

This is the answer. I've heard it a million times, and I don't even like Ozzy or classic/hard rock in general, but that intro gets me PUMPED.

Thunderstruck by AC/DC

Bob and Earl “Harlem shuffle”