Been thinking about this for a little bit and maybe it's something Nomura might touch upon in 3. Is Sora secretly under a lot of stress? I mean think about, he basically had the whole shoulder of saving not one world but multiple worlds and had to do it by himself a good number of times. So maybe his happy-go-lucky personality is a facade, since a lot of people think his personality is unrealistic, that he might be under a lot of pressure when he might be the key to ending all of this. Remember he was a kid when this all started and nearly lost all of his friends a number of time. He also feels responsible for taking away Roxas' life or at least play a huge part in it. This is also a common thing in the real world where the nice guy/girl might seem nice on the surface but might be dealing with a lot of personally issues. We might have seen a glimpse of what Sora was really like in Re:COM, when he actually showed some legitimate anger when in later games he's been a little more passive. This could've been because of Namine messing with Sora's memories and changing who he was trying hide to what he really was. He also broke down when he reunited with Riku giving another example of this. Sora might also feel like he isn't worthy of the keyblade which might explain his lack of interest in the Mark of Mastery exam (Though this one might be stretching it.) This might also be why he was so easily taken by the darkness in 3D. So what do you guys think?