These are some of my favorite songs (I still forget a lot I guess...)
Tool - Schism (tool is actually my favourite band, lyrics and music are just awesome)
System of a Down - Soldier Side (just a great group with great music)
Carl Orff - Carmina Burana (openings sequence "O fortuna", for those who don't know, check
it out on Youtube, it will literally blow you away ;)
http://www.youtube.com/watch?v=7xCB6-h3wbs
3 Doors down - When I'm gone
Metallica - Nothing Else Matters (classic one)
Slipknot - Wait and Bleed (short, powerfull song, some say its quiet repetitiv, but hell, it sounds great :))
Stone Sour - Bother (singer of Stone Sour is the leadsinger of Slipknot, but you will clearly hear the difference between slipknot and stone sour)
Radiohead - Street Spirit (just another great group and great song)
Pearl Jam - Black (same applies for Pearl Jam :)-
Michel Fugain - Une belle histoire (french song, always makes me think back of my youth (allthough I'm still young lol)
Deep Purple - Sweet child in time (classic one)
Led Zeppelin - Stairway to Heaven (even more classic one)
Dope - Die Motherfucker Die (not so classic, though perfect after a long hard working day :))
Slipknot - Vermilion pt 2 (an a-typical slipknot song, just check it out, you might like it :)
Nirvana - Smells like teenspirit (o so classic one, but o so good as well)
Most songs can be found back on youtube, my advise, check them out! :)