Favourite Kingdom Hearts games in order:

First of all, I´ll mention that I haven´t played Chain of Memories and ReCoded.
I might never play them, but I´ve seen my brother play them and believe they just don´t appeal to me that much at this age.

So I will talk about the ones I have played.

1.358/2 Days: I loved the story, characters, and the whole dramatic/tragic mood it had. The whole ice cream thing was sweet also. Gameplay could be uncomfortable though.
2.Kingdom Hearts II: An all around very good game. Enjoyed the final fight against Xemnas so much.
3.Dream Drop Distance: Gameplay-wise it was very good, 3D graphics were also enjoyable at times, and it is the only KH game in which I can say I enjoyed every single level (it is usually Colliseum of the Olympus´s fault that I didn´t so much in others ). However, story-wise it was a bit bland, odd, confusing, compared to others IMO (or at least if felt odd to me ... maybe because my bro told me that this was the last one and I expected more) and the battling finale could have been better. Also, despite the abbilties you gained from them, I didn´t like the dream eaters. It was great at times but I guess just enjoyed the other two a bit more in general.
4.Birth By Sleep: Absolutely loved the fact that you could control three different characters, even though you could have had the visiting different worlds. Gameplay was also very good, but I found the previous three more enjoyable in some aspects.
5.Kingdom Hearts: A good game, I enjoyed it. It´s just that I enjoyed the others more. Gameplay in battle was a little slow and limited to just hitting with your keyblade.

What about you?