That's exactly why I'm a fan of the Chargers. It's hard not to get caught up in the excitement of their success, since after moving here to San Diego, they started getting good, and people got more and more excited as years went on. But I always kept Bears #1. I do know I rooted for the Raiders since I was a kid, first getting interested in football, mostly because of the mystique and the tradition of it all. I was happy as hell when the Raiders made the Super Bowl, but after they got slaughtered and started going down the toilet, I stopped talking about them, and went into that closet.
For the record, when Raiders and Chargers play each other I do make it a point to root for the Raiders. So I guess Raiders are really #2. Chargers are more like "Hey that local team..."