Mine has to be the Phillies. Even though they sucked in recent years, I still love my Phillies and I hope they reach the playoffs and win it all in these next few years!
I'm a Marlins fan. Excited that we are looking like a contender so far this year. If Sandy can get back to consistent form we could really make a push for the playoffs.
I grew up watching GI Joe and Transformers on WGN in the early-80's. Because Wrigley didn't have lights, I'd occasionally run into a Cubs game on WGN in the afternoon and was too lazy to actually go outside and play.
I learned pretty much everything about baseball listening to Steve Stone.
So yeah, it was the Cubs up until after 2016. The WS was awesome, but the new owners are pretty crap, so I'm mostly just a fan of baseball now.