Is it just me, or does it seem like Birth By Sleep is the only game where the protagonists seem to actually be affected by the worlds they visit, in the sense that they actually don't have their experiences 'locked' in the world like it seemed with Sora in KH2, like how he would just visit the world, do some stuff, and not really learn anything. If there was any other game that the protagonists seem to actually learn anything from their experiences within worlds, it might be Chain of Memories, but it still doesn't seem like it to me.