oh WOW. are you KIDDING me? =b
my first time, it took me around 35 hours. but yeah, i'd have to agree with what other people are saying--cutscenes alone are quite a lot of game hours by themselves, not counting the many times they're repeated if they occur right before a boss battle you keep losing (i must have watched the cutscene before the dragon boss fight about 11 times...i began reciting it along with riku, it got that bad) haha "yes, a keyblade, but unlike yours, this keyblade holds the power to unlock people's hearts. allow me to demonstrate...BEHOLD!" lol.
is 35 hours bad? *grins sheepishly* it was the first PS2 game i ever played in full.