This is hardly the place to get into a "Sora so suX0rZ" debate, but I think he was a good hero. And one does have to remember that he acts juvenile because he IS! He's only 14. And he's devout in what he believes, and was willing to do a great deal of things, either crazy or self sacrificial to save those he loved. That makes him pretty okay in my books.

But yeah, he has Kairi's heart from the moment she passed through him in Destiny Island (That's what it's called....rite?). It's illustrated by a few scenes, like the slideshow in Deep Jungle, when the Castle is shown.