Sorry for the belated reply on this! I ended up listening mostly to the stuff I already knew I liked (Wait, Wait!, Car Talk, Dinner Party Download), but I did try out an episode each of Greg Proops, RadioLab, and Stuff you Should Know. The latter two were decent and I'd try them again sometime, but the episodes I heard weren't so great that they compelled me to shun NPR's Wait, Wait! (which I already knew I liked and had 10 episodes downloaded). I might've just gotten a bad episode of Greg Proops, because I wanted to like it but gave up after about 10-15 min. I also listened to an episode of 716 Sports Podcast, and while the first half was boring (to me) because it focused on football, the second half was fun as they discussed the Sabres. I'll definitely keep this list to expand my options in the future, though, so thanks all for the suggestions!