Aw, you don't have to root for the home team. Back in the days before the Pats redeemed themselves, my husband (in Boston and then D.C. at the time) would root for the Cowboys, just so he'd have a chance at seeing 'his' team in the playoffs. My mother's a Redskins fan, so they've got a reasonably good-natured ribbing going back and forth there.
Now that we live in Ohio (an argument in itself for rooting for the 'away' team), we still follow both teams, along with the Saints, just because a friend of ours said he'd 'only watch the Super Bowl when the Saints played.'
We're going to hold him to that one of these days.