Right now (May 6th, 2018), Revisionist History is my #1 favorite podcast. Malcolm Gladwel is a great storyteller. His three episodes on universities in the USA are excellent. This is a podcast in seasons. Season 3 will be launched soon.
The other podcasts in my main list launch episodes regularly and are:
These are the podcasts which are in my main, general interest list. This means that other podcasts that I listen to which are either:
The list is dynamic so in a few months my main list can change.