I actually like to see them in this type of forum to see how they communicate. I think that Obama came off as looking like he was reaching for answers sometimes, mainly because of his speaking style of uhh...uhh.
I've always thought he speaks that way because he's actually thinking
about what he wants to say, rather than vomiting out whatever talking points were handed to him that morning by his handler (like most politicians).
John Stewart said he also thought the same thing, but now realizes that Obama is thinking more along the lines of "I like food. My kids are nice."