Die hard fan of:
San Francisco 49ers - Born and raised in Bay Area, plus my mom's side of the family are all 49ers fans. Grew up in a 49ers house. My dad was a Steelers fan, and his side of the family were Raider fans, but the stronger influence on me was my mom's side of the family, so I took to the 49ers.
Orlando Magic - No basketball ties in my family, since my dad didn't really have a team, and my mom wasn't a fan. Growing up in the Bay Area, the Warriors sucked at the time (well, Run TMC was exciting), so everyone was a Chicago Bulls / Michael Jordan fan. Kinda wanted to go against the grain, became a fan of Shaq, and started to cheer for the Magic. The Magic are probably the closest thing I am to a bandwagon fan, since they aren't a local team and I became a fan because of a player, but I remained with the Magic after Shaq left, after Penny was traded, the "Heart & Hustle" year with no superstars what so ever (Still love the crap out of Darrell Armstrong and Bo Outlaw), the T-Mac years and Grant Hill's busted ankle, T-Mac's defection, and the eventual resurgence on the shoulders of Dwight Howard. Recently made the drive from Nashville, TN to Orlando, FL to attend my very first game at the O-Rena: Game 5 of the Eastern Conference Finals vs. the Boston Celtics.
San Francisco Giants - Grew up in a house divided; my dad and his side of the family was Oakland A's fans, and my mom and her side of the family all San Francisco Giants fans. So I grew up rooting for both for the longest time, but eventually, I just drifted towards the way of the Giants. Barry Bonds helped, I absolutely LOVED the teams of Bonds, Matt Williams, Will Clark, Robby Thompson, Darren Lewis, etc... I also remember going to picnics and gatherings with family and family friends, listening to Giants games and playoff games on the radio, and the heated playoff race against the Atlanta Braves that required a 1 game playoff (before the Wild Card was instituted). Those fun memories also helped turn me to a Giants fan. And to this very day, even being in different divisions, I still hate the crap out of the Braves. Hate our current ownership, and don't agree with the direction of the team, but I'm still a fan.