I have talked to him twice. Once when I walked up to him at a non-press event, and at the Avatar press event where I was in the last group of the day. Based on those two interactions I totally agree with you.As I watch Cameron talk in these interview I get the impression that he does not consider it some onerous duty to talk about his movies and the technology he uses. He impresses me as, and I mean this in a positive light, a geek. I've gotten that same feeling about Peter Jackson, that he enjoys talking about his movies and how they're made.