There's some overlap in the ones I listen to with the ones already mentioned

Fan podcasts

The Steven Universe Podcast is produced by the CN itself and hosted by a fan. Story boarders, producers and VAs get feature quite a bit and it's nice to hear them shoot shit in a pretty relaxed setting.

Everything's Coming Up Springfield consists of its hosts discussing a Simpsons episode with a guest for about an hour, but the discussions have a tendency to enthusiastically follow through all sorts of diversions. I think the earlier episodes are the best and the first episode with Alex Hirsch on Bart's Comet is one of the best so give that a try at first. Later on the show starts losing its steam as the most memorable episodes have already been picked.

Infotainment and education

I'm going to be honest - I find both books and video to be way superior content delivery formats to podcasting for any kind of learning, so the more a thinky podcast strays away from current affairs, journalism, interviews or discussion a podcast goes towards didactic stuff, the less enthusiastic I get since I could be just working on my desk taking notes. Never-the-less, two shows I listen to are so well done that even with my misgivings I like to recommend them.

History of Philosophy Without Any Gaps by Peter Adamson and History of Philosophy in India, by him and Jonardon Ganeri. Each episode is about 20 minutes long except for the interview ones that tend to be bit over half an hour long. I think this is roughly as good as has been done in the medium so far and perhaps as can be.

Miscellaneous podcasts

black fellas podcast (or is it African Dissent?) - an international tag team discusses various things from politics to dating as black people. Hasn't updated in a while and has only 7 episodes so far which means you can listen to them all and get it done, a thing I consider a positive.

My Worst Own Enemy is a somewhat rare beast, a mental health podcast. It's mostly not that self help orientated (which is good since I hate that kind of shit with passion) and mostly interviews scholars and practitioners in the field.

I tried to give a listen to The Adventure Zone and honestly I just couldn't pay attention to it enough or something. I usually listen while I'm on a walk but apparently the environment and its noises bring enough disruptions that I couldn't concentrate on the narrative. I've had similar troubles with audio books, which is a format I just can't digest at all. I stopped around the part after the murder mystery arc, but if you don't share my symptoms, go ahead! The first one in which they created their characters was fun, so it's not a thing you need to follow for 20 hours to get the first pay off.