Don't get me wrong: I've lost plenty of my life to Unreal Tournament.
But I got bored sick of the fact that most games (if they're not sports or racing games) boil down to just another FPS with a different setting and different graphics. The fact that the Wii would break that mold was a big reason that I bought a Wii after not owning a single game console since my original NES.
I wouldn't mind a good FPS for the Wii, but it'd only take one to make me happy (and preferably, not one with a contemporary or retro war theme). Actually some of the games I liked the best when I was younger was fighter jet/helicopter games... not seeing any of that on the horizon for the Wii yet either.