Hmm tough question! If it's a movie about my entire life, then I think I'd pick a wrestling entrance theme song...like the music they play when a wrestler is making their way to the ring.
One of my favorite tracks used in wrestling was Triple H's entrance track "My Time".
If you're wondering why this track...
I was really into wrestling as a kid, I used to watch it lots with my dad.
And in highschool, I used to mainly listen to metal, which ties into the genre of this song.