East Bay born & raised, but even before the Raiders left I was a Niners fan...my uncle tried to make me a Raiders fan but it didn't take. 1970s East Bay wasn't easiest place for a kid to be a 49ers fan, most kids were Raiders (or Cowboys or Steelers) fans...more than a couple playground fights.
My baseball fandom is admittedly screwball...A's and Reds (long story)...used to hate the Giants but still grew up knowing all the players, listening to Hank Greenwald & Lon Simmons, then warmed up to them in 87 playoffs because I liked Clark & Hack Man and hated the Cards. My wife & kids are all huge Giants fans, even though I'll root for Giants they still love to give me s**t when A's and/or Reds suck which most years is both.
Basketball it's always been the Warriors.
College football I don't really care, I like both Cal and Stanford.
[ Edited by DelCed2486 on Dec 1, 2016 at 3:55 PM ]