Cubs, Braves and Marlins.
The Cubs and Braves where always on TV, so I watched a ton of there games growing up. I lived in Florida for awhile.
Went to a lot of there AA, and ST games. Was able to watch Beckett, Burnett and some others come up through the system. I have a healthy respect for their player development. And as a financial under dog, it's always fun to see them contend.
But in the end all 3 are a far far distant 2nd.
Outside of that I like to watch certain players more then certain teams.