re: Songs you can always rock the hell out too

Damn!!! Many of my favorites already mentioned. And not really the big hits either:
Thin Lizzy -- Cowboy Song
Molly Hatchet -- Flirting With Disaster (Okay, their biggest hit)
Black Sabbath -- Neon Knights
Smashing Pumpkins -- Bury Me
Iron Maiden -- Revelations

Kudos to you folks.

Here are a few I'll add:

Chevelle -- The Clincher and Face To The Floor
Deftones -- Be Quiet And Drive (Far Away)
Helmet -- Give It and (High) Visibility (Two of MANY Helmet songs)
Motorhead -- In The Year Of The Wolf
White Zombie -- Welcome To Planet Motherfricker/Psychoholic Slag
Riot -- Outlaw
Exodus -- War Is My Shepherd