I like listening to all the pinball/gameroom podcasts. The more the better! It's great to discover one a little late, and then have 20, 30, or 40 podcasts to catch up on!
My favorite non-pinball podcasts are all on Kevin Smith's Smodco.com: Smodcast, Fatman on Batman, and Tell 'em Steve Dave (TESD).
Pinball needs a podcast more like TESD. These guys never seem to be talking to the audience. It's the most natural, uncensored, and entertaining podcast I've listened to. Ben Heck and Jason Jones come the closest to this type of format, but I don't think they've had a podcast in over a year (I could be wrong).
I'll admit, I've daydreamed about having my own podcast, and I'd love to just sit for an hour with someone and just talk about pinball. We wouldn't worry about the latest news, the latest products, the latest machine, interviews, contests, tech or restoration tips, special segments, or in the field recording. We would just go where the conversation takes us.