When Maron talks to people outside his wheelhouse like Michael Cera- younger, successful, not exactly in stand-up- he tends to roll over his guests' attempts to answer by beginning another question. It's not necessarily a bad thing exactly, more conversational than rude, but I get the impression Maron's not really listening if he asks no follow-ups or moves on to another point. Example: he asks Cera about the British comedy he likes then interjects that "yeah, I'm not wired for British comedy", which for WTF listeners we know. Woulda been nice to hear more of Cera's opinion of good Brit-coms instead of getting misdirected cuz the host lost interest.
But that's Maron being Maron, he is who he is and I'm still a fan. On the other hand, I kind of enjoy when an old-timer like Fred Willard won't get out of the way of his own storytelling and Maron has to buckle down to get a word in. Also, the WTF with Mary Mack was quite charming.