Argabah just seemed like a rehash of the previous Kingdom Hearts. I guess it's either laziness or proof that Sora has already lost quite a bit of his memories. Nothing like beating Jafar doing an air split. Heh.
Larxene has a good English voice. Beyond that? The only other man to retain his feelings after losing his Heart? Ansem, right? Xemnas? Er, I think theories are still being thrown around about this, but I haven't looked.
Olympus is proving to be more than just a proving ground/arena, but I've barely started this one. Looks like Sora will be taking on a memory challenged Cloud. Loads of fun.