I watch every week of the NFL season and am a HUGE Carolina Panthers Fan.
I watch the Red Sox's whenever there on ESPN and I'm not too terribly busy with life. i always watch every Red Sox's and Yankees playoff game possible.
As for the NBA, I only watch the Playoffs, so I don't really have a team. I simply pick one of the 16 playoff teams and when they are eliminated, I pick one of the remaining teams left. I simply enjoy watching playoff basketball. The last two years I have supported the Pheonix suns the last two years, and will continue to do so until they miss the playoffs. I absoultely love Steve Nash
You can't even see Hockey on National TV anymore unless you have the VS channel (even the damn playoffs); therefore, i do not watch it.
I also have an addiction to the Men's world cup that occurs every four years. I can never watch a soccer game between DC united and some other random team, but when Italy plays Germany I can't even go to the bathroom because I am so glued to the tube. I always support the U.S. but they will never make it to the Round of 16. Outside of the U.S., I support all Latin American Teams with the exception of Brazil; I dislike all European teams except Germany and Ireland(my heritages); and I will always support Japan, South Korea and Austraila.