what i liked about the games so far:
BbS: 3 different (extremely diverse) characters, all with decently flexible styles, and the storylines were great
KH1: i liked how no matter what world they went, they stuck to the main plot & ideas...Sora going Heartless was a nice twist
CoM: let's you use someone other than Sora (not counting BbS or the Xemnas fight in KH2) and the card system was fun
358 Days: made me laugh a lot with the Axel scenes, and the mission mode lets you use tons of characters, all with their own style
KH2: the drive forms....seriously that's all i liked about it
Coded: the twists with Mickey & friends getting imported to the datascape, Sora's "journey" etc
(if anyone hasn't played all the games & i spoiled for you, then im sorry)
i still have a couple questions tho, and im sure 3D will give me the answers.