I think this has a lot to do with simply what sports teams are in your city. A lot of Americans think hockey is boring, but the ones that do have no emotional investment in a team.
For me it is basketball, specifically the NBA. Everything is so manufactured. Intentional fouls, giving half court if you call a time-out in final two minutes. Not to mention there is more commercials in the final 2 minutes of a game, than the rest of the game combined(not counting halftime).
I would say racing, but that is not a sport. If driving something was a sport there would be a ton of taxi and bus drivers in London right now who would be medal hopefuls.
Do you seriously believe driving a bus or taxi is even remotely similar to driving a race car?? The amount of concentration and focus that is required to pilot a race car is something 99% of us cannot come close to. Plus there is an enormous physical toll on the body when your are muscling that steering wheel against both positive and negative G forces constantly being applied on the body. Just one lap in a high powered race car would definitely have you singing a different tune.