Sometimes, a laugh like this would appear fake, but his laughter seems quite sincere and natural, no?

I definitely feel his laughter is natural and sincere. I've never seen a picture, or footage, that I think is a false expression. I think that if he's not really into what's going on, there might be a distant look in his eyes, just kind of zoning out what's going on. I'm sure he could be insincere if he wanted to, but I don't think insincerity comes naturally to him.
kathy