I was a Boston fan for a long time... then they won the series and turned into the Yankees. Massive payroll, bad attitude fans... actually, now that I think about it, I've always hated the Yankees, but never really had a problem with the fans, since they tend to be very knowledgeable, so the Sox are actually worse than the Yankees right now.
Even still, I couldn't care less about the Rockies, they're still just some dumb expansion team in my eyes (even though I know that's not really the case any longer)... so I'm kinda rooting for the Sox from the closet.