I love Kingdom Hearts [and anything associated with it >W<]
Kingdom Hearts II was a huge improvement over the first one, in my opinion. I loved the battle system [kinda made me feel like God, how easy it was to operate] and, the camera was so much better... I hated the first game's camera.... and that rolling thing you had to do to evade some stuff >< I would CoM before playing II; it helped me a lot. ^_^
The only thing was that I played through the story of II without dying once.. It was a bit too easy for me, but there's still the challenge of Sephiroth that bugged me for... a while...