No matter how many times i replay these games, the awesomeness never ends.
I can't stop playing them, i really can't.
Since my PS2 died i was DYING to play any of these games anywhere, it didn't matter if i had to start all over again, i still enjoy it.
Now that i have a good PC i can emulate them with no problems.
If you haven't played the Final Mix versions, i really recommend you to. Why? It adds a lot of things, and what i like most: Final Mix Proud Mode for KH1FM and Critical Mode for KH2FM, these two gamemodes put you to the awesome experience of Kingdom Hearts depending on how you play.
I play with wise moves, i try to not to move that much and block/tech-hit/counterattack everything, i just use dodge rolls when it's neccesary, if i have to heal i use Curaga, not potions, this makes the battle intense
If you are that kind of person who just rushes and mashes attack hoping to win then you are screwed, and you shouldn't play Final Mix versions if that's the case.
If you think you are up for a challenge, then go get Final Mix, the only problem is that both are in Japanese, except KH2FM that has a fanmade translation in english and italian.