This is sad. The Chronicle didn't ask me, but reading through the post & comments at Cosmic Variance, I couldn't think of a single guilty pleasure. I used to have some, but they have faded away over time. I don't know, maybe Partick O'Brian novels. Guilty pleasures are those things you do that seem to need to be explained, given one's usual identity, role, etc. And I do find myself explaining O'Brian's attraction fairly often.