Daaaaaaaamn!
Now that's a good theme.
I honestly believe that the Terrans have the best music in the whole game. I mean, the Protoss music is boring, and the Zerg one (Except Radio Free Zerg, of course) is too disgusting. Feels like I'm playing it inside a stomach, and being slowly digested and crapped while I go Zergling Rush on one of my poor friend's butts.
But the Terrans? Now there's a music I can kick ass with!
"Rock and Roll!"
"You got any questions about propane?"