Its a shame Rugby wasnt on the list, I would certainly have voted for it. But out of those, I would say Soccer. American football is way over-hyped! Its like Rugby with all the brilliance sucked out of it, replacing it with stop/start hinderences that remove all fun and tension.

I suppose it just depends what sports youve always been watching though. One thing to note though is that the rest of the world seems to hold football (as in soccer) in the highest importance, while the US doesnt. The World Cup is THE sporting occasion, probably bigger than the Olympics for a lot of people. But not in the US.