Watch any interview and you'll see he never answers any personal questions seriously. He jokes, he answers the question with a question, he laughs it off. He mixes it with humor, charm and playfulness. That's why it seems like he's scheming because he never really answers personal questions with a straight answer. He deliberately brings up "pranks" he plays on matt Damon and brad Pitt. This side tracks the interviewer who then starts asking him about the prank. Matt Damon and Brad Pitt have also adopted this trick although he's the master of it. It drives some reporters crazy, although some are as bamboozled as the public who find his interviews delightful.
By the end of the interview you are no closer to knowing anything clooney doesn't want you to know. And the only thing he wants you to know is about his movies and his causes.