Well I'm from Raleigh, NC so there are some good rivalries right around me. My father went to NC State and my sister goes to UNC-Chapel Hill. Those games are fun, lol. I pull for NC State but they usually suck so I just watch most other games for the enjoyment. I do have preferences for a winner depending on who's playing.
For pro, I always pulled for the Panthers. I couldn't believe when Delhomme threw the game away in the playoffs last season. He's ok most of the time, but when he's off, he's really off. ugh

Hopefully they can do something this year. I hope they have a chance to get back to the Super Bowl before Steve Smith gets out of his prime and/or retires.