You know you've played KH too much when...
-you always act like your favorite character.
-You quote KH all the time
-You want to see Sora in Super Smash Bros.
-You wish Keyblades are real
-And finally, when you know the color of Kairi's panties from the KH2 "glitch".
Well that's disturbing xp. I think that would answer the question 'when do you know when you've played KH too much' quite perfectly lol