Yeah, not to be unoriginal, but I have always liked Meechegan. Great fight song.
Also Texas Tech, because they manage to beat either TX or OK every year and fuck up someone's season... nice. I love bringing up the Red Raiders to some of the horned moo cows I work with and watching their heads explode. Will find myself rooting for OK against Texas, but could care less.
Va Tech - I like Beemer Ball.
Have always liked Cal too - not sure why - maybe because I hate USC and UCLA.
Penn State - got a soft spot for JoePa.
Teams I would never pull for under any circumstances UNLESS they were playing bammer:
U of Sucky California
Notre Dame
FSU (HATE all things Bowden, goldangit)
Texas and most all of the Big 12 - for obvious reasons.