Has it really been ten years? Holy shit.
That was a great game in my opinion. It was literally one of the only things my friends and I would talk about back in elementary school. We loved it to the point of pretending we were all Sora, Donald, Goofy, and a bunch of heartless fighting each other during recess.
I've never actually beaten the first game by myself though. One of my friends had to help me with the final boss. I was able to beat the second game on my own at least.
I'll also say that the games inspired me to play some of the Final Fantasy games. Starting with VII, then IX, (My absolute favorite as you can tell by my avatar), X, IV for the DS, and XIII.