Marc Maron's hilarious, raw and often revelatory heart-to-hearts with fellow comedians such as Louie C.K., Carlos Mencia, Robin Williams, Janeane Garofalo, Sarah Silverman and many others have made WTF one of the most listened-to podcasts on the web. In this interview Marc talks about the impact of WTF on his life, his sometimes uneasy relationships with other comics, his on-mic persona and the differences between conventional radio and the faster, looser world of podcasting.