Aaah. I found out about KH in a kind of odd way...
OK, I was eleven, and I was a huge fan of DDR, but where I live, there are, leik, no DDR machines. I loved some of the songs on the game and tried to find them on the internet, and that's when I stumbled on YouTube. I typed in one of the song names ("Candy" by Kosaka Riyu) and the first AMV was to do with KH. I watched it, and it had the KH ending in it. When I saw the part where Sora and Kairi were pulled apart, I instantly identified with it, as some of my best friends were moving away as well, and I researched it...
Later, I bought CoM, then got KH and KH2 for Christmas. I've loved it ever since ^_^
Now "Candy" has become a trademark Sora and Kairi song for meh.