I absolutely loved 2. I beat 2 before I beat 1, but went back and beat 1, and beat 2 multiple more times.
I can't say I have an order, but I love:
- Kingdom Hearts 2
- Kingdom Hearts 3
- Kingdom Hearts: Birth By Sleep
Those are my favorite from the series as whole.
I really couldn't ever get into Kingdom Hearts Chain of Memories or Re:Chain of Memories.
Back in the day, I bought Birth by Sleep and beat it, but wanted more; so there was an English Patch of the final mix for PSP available and beat that too. And when the collection came out on PS4 (Before the PC release) I went and bought a PS4 Pro just for KH collection. Which now I am going back and beating all of them again but on Proud.
I ditched reddit, and what's being described in this thread is largely part if why I left. I won't go back.