Right now (May 6th, 2018), Revisionist History is my #1 favorite podcast. Malcolm Gladwel is a great storyteller. His three episodes on univerities in the USA are excellent. Other podcasts in my main list are:

• EconTalk, by Russ Roberts, is another podcast on my main list. I loved his many interviews with Nassim Nicholas Taleb.
• Freakonomics Radio. I loved their episode on barefoot running.
• Hidden Brain. Their episode on Deep Work was the best I have heard on the subject (and I have listened to several podcast episodes with Cal Newport).
• Radiolab. The recent Border Trilogy was touching.
• ReWork. I am a big fan of @dhh so it was natural to me to listen to this podcast.