Here is an amazing collection of podcasts to BLOW.YOUR.MIND. Seriously.
More than simple background listening, this is the kind of rich storytelling that requires 100% of your attention; that revives the appeal of radio.
Two key elements to a great podcast:
• Masterful storytelling
This American Life has some of the best reporting/storytelling there is, and have many ground breaking stories.
How Sound is about the art of storytelling itself, even critiquing clips from other shows.
• Captivating audio engineering
Radiolab paves the way in this respect. Good modern radio owes much to the innovations pioneered by Radiolab host Jad Abumrad.
Stephen J. Dubner & Steven D. Levitt
Jad Abumrad & Robert Krulwich