My favorite podcast used to be Pinheadz, with their top notch production values. Definite podcast of the year. Then they stopped.
I only listen to one now, and that's K's podcast. It's 90 minutes or less(the optimal length), NO boring tournament talk, and 100% controversial. No filter on what he says. Yes, he's the Howard Stern of pinball podcasts, and wouldn't have it any other way. He also has great guests on.