I get creeped out by people who strongly identify themselves with sports teams in general-- the kind who buy the jerseys and wear them all of the time, get Miami Dolphins (completely random choice, honest) blankets, clocks, license plate frames, and so on. Not sure why. It's as if they're rooting for a side in a war that doesn't mean anything.
Not a big fan of football because it's boring and it fucks up your body. It makes me uncomfortable to see guys run into each other, punch each other, land on each other, or any of that stuff. Needless to say, boxing is even less of a thrill for me. I don't care that guys like to do it; I just don't want to watch it.
Luckily, I managed to find a boyfriend who is totally apathetic about sports-- will watch the Super Bowl with some friends, but that's about it. Also very much a libertarian. I'm not sure if those are connected in any way in his mind, though. Maybe an aversion to sports is just another form of non-conformism that libertarians tend to pick up.