My favorite team is the 49ers, and I'll of course be their owner at some point (in the game I mean), but I was thinking of using a different team as well. My candidates include:
Kansas City - Priest Holmes is awesome.
Indianapolis - Would move them if I owned them.
Browns - Would be fun to build them up.
Vikings - Would be fun to put their talent to good use.
Lions - J/K. Only reason I would is to fire Mooch...