NFL -Cincinnati Bengals. It is a terminal disease. I tried to quit once but it did not take.
MLB - Meh, do not follow it closely but I used to be a Reds fan (dad worked for the Reds) and a Cubs fan. The strikes did me in. At best I am a casual fan. I am a fan of the game of baseball though. I can watch a game on TV just for the sport of it.
College football - ND. I was raised in a Irish Catholic family, been drinking the blue and gold for as long as I can remember. I also follow UC, but until recently there has not been much to get worked up over, and I like UT fine unless they play ND or UC.
NASCAR - I root for Mark Martin but to be honest I do not follow the sport as fervently as I used to.
NHL - not much of a fan but I do look in the sports page to see what the Blackhawks are doing. I used follow it when we lived by Chicago. Playoff time is always a good reason for a party up there.
I follow all sports at Cincinnati Elder High School. Check the Cincinnati Enquirer everyday to keep up with whats going on. Purple Power, Altiora!