The only American team sport I follow is NFL, and while I did watch it a bit back in the early Ch4 launch days, I've only been back into it properly about 3 years. Although all my mates that are into the game have teams, it felt a bit weird to artificially pick one for myself now.
Instead, every week during the season I have a little accumulator bet based on teams current form. I keep a record of who's won most often for me during the season, and that's my super bowl team. I buy myself a hat and shirt for that team to wear at the annual super bowl party I go to.
Last year I was a Panthers fan for the day and the year before, Patriots. So far this year, Patriots, Raiders, Cowboys and Dolphins are my winningest teams.
Much more fun than picking a single team to support for no good reason