my fondest kh related memory has to be the first time i beat kh2! it was the summer back when i was 10 and older my brother was watching me play [and playing as riku during the final fight] and cheering me on. i watched the final cutscene for the first time, and we talked about how we'd play kh3 together when it came out.
kh means so so much to me, it's always been a game that my older brother and i have bonded and connected over!