NFL football is certainly my favorite sport. (Go Vikes!!) I live in Madison, WI and have Vikings season tickets (I GLADLY make the commute for every home game and typically see one or two aways games as well). And, of course, I have Sunday NFL ticket to see all the away games that I don't go to in person.
College hockey (specifically Sioux hockey) is definitely a close second. When I lived in Grand Forks, ND (where I was born and raised, BTW), I had season tickets for several years (at least when I wasn't a student getting in for free). Sioux hockey is THE reason I most miss living in Grand Forks. None of the sports bars seem to be able to get the games this year (something about the signal from the Ralph changing from variable analog to variable digital). DANG IT!!!!!!!