I'm usually not very interested in sports (1) because I have other hobbies (2) because I can't watch sports without a TV, making following sports impractical.
However, there are some sports I would love to learn about/watch/play.
Top Contenders:
Polo
Fencing
Martial Arts
Rugby
and Australian football.
Aussie football is neither soccer nor American gridiron. I sadly don't know much about Aussie football, but what little I know sounds good.
Jake showed me this video today. It's just plain amazing.
-Luke