Since I was a child, I always liked japanese stuff, like anime and videogames (back then I didn't even knew those were japanese), now I don't watch anime at all, I'm not to keen on it now, the ones I know are Pokemon, Capt, Tsubasa, Beyblade, Saylor Moon and Chin chan lol (ah, nostalgia).
I started studying japanese last easter because I got addicted to Jpop, and if I like something, I try to know everything about it, so I started learning japanese. Nevertheless, only since last (late) December I started studying for real, I bought Genki and am about to go to lesson 8.
I study it because I love to study it. And because I'm going to college to learn it as a minor (chinese as major) and wanna be the best of my class, and as I'm not going to have only japanese and chinese, but also its geography, culture, economy, politics, etc, and will need as much time to dedicate myself to those, so, the more time I save, the more I'll actually be able to study for the other subjects.
And because I really like japanese culture, all those お寺 drive me crazy.