Hm. I've never thought about his personality before, but I really like him. He's really funny. Also, I feel similar about my chameleon stuff. (Sometimes I feel I can be anyone with any kind of personality, because I understand them, and I'm able to see truth behind different motivations and personalities. I'm glad you wrote about this, and maybe this is why I like Roger).
I'm not sure we can categorize him and what he's doing is definitely healthy (for a human, but mbti are not for aliens anyway). So, if he has a mental illness as a "man", we can't use mbti. Though I've always felt he was an extravert.
