P3P is the best game for PSP I have ever played.
FFXII i played for 200+ hours, mostly cause Yiazmat was being a frekaing a-hole
For KH1, the only reason I could see you playing for such a long time would be training and practicing to defeat Sephiroth. Otherwise, playing for that long a time would be pretty pointless.
I know, right? A lot of people I know never even heard of the Persona series until I recommended they play P3P, I lent it out to a gazillion people, and every single one of them loved it I'm playing through again right now, trying to max out all my social links XD