Either "Fuck You" by Cee Lo Green: http://www.youtube.com/watch?v=CAV0XrbEwNc&feature=channel
Or
"Dancing With Myself" by Billy Idol: http://www.youtube.com/watch?v=0VNx78SAq8M
"Take this, my Love, my Anger, and all my Sorrow!" - Domon Kasshu - Mobile Fighter Gundam 
The return of the 'G' - http://www.youtube.com/watch?v=ZQnxVzOuVFE
Or
"No good at life, but very funny sometimes with the commentary."
The DOOM song. O.O
WHO THE HELL DO YOU THINK I AM
heh, I hate to say it, but I have to go with Chelsea Dagger.
http://www.youtube.com/watch?v=20j46wROj-0
What can I say? I'm a huge Blackhawks fan and that was their goal song for some reason. I know nothing else about the band Fratellis, but that song always pumps me up now. If that played everytime I did something awesome, I'd just freak. 
[INSERT WITTY SIG HERE]
Genesis by Justice
Waters of Nazareth makes for a good theme also. Because you know, we are your friends, you'll never be alone again.
I'd have to go with Robot Rock, by Daft Punk. http://www.youtube.com/watch?v=r4rhX6iB-2o
Makes me feel like I need to be walking in slow motion away from an explosion in my Cool Guy sunglasses while SWAT helicopters circle overhead.
id go eletronic with mine either being
Your A Woman Im A Machine By Death From Above 1979
http://www.youtube.com/watch?v=GlyjlM2IWk4&feature=related
or
Tycho By Cascade
Yeah, but it's more of a "I just pulled something badass" than it is a theme by itself.
Thx Hazel and Costa