Space has always been a major attraction for me. I want to explore space, like in Star Trek, Dune, or Firefly. I've watched just about every good sci-fi TV show and movie there is. Whereas I can't swim, have a fear of large bodies of water (it's not exactly a logical fear), and am literally terrified of the idea of deep sea monsters (even if they're not actually monsters, like the giant squid)... yeah, that's an easy one for me. Just thinking about deep sea diving makes me shudder, and not in the good way.
Laser tag vs. Paintball.