99% invisible is great , really listenable. Based on architecture and design but it's so much more than that.
This American life - can be hit and miss but the recent episode on school shootings was brilliant, if harrowing.
Griefcast with Cariad Lloyd is a sensitive discussion of loss which chats about so much more.
I really like the Adam Buxton podcast - he can err towards sycophancy a bit but when he doesn't - recent chat with Jayde Adams for example- it's just two people having a ramblechat.
Lore - earlier ones were brilliant, unfortunately Aaron is running out of source material now but he researched everything so well it draws you in.
RHLSTP is always a good listen : although I tend to FF through RH's initial 15 minute self aggrandising wankathon at the start and cut to the interview.
If you like Comedy, the Comedian's Comedian podcast with Stuart Goldsmith is very good. He talks in depth with comedians about their 'craft'. The ones with Jimmy Carr I found fascinating. I had him down for a bit of a twat and actually he came across as a thoughtful, switched on person.
Mister Gameshow with Mike Wozniak - Old but funny.
Ditto Alex Horne Breaks the News: if you like Taskmaster it's broadly similar.
Pappy's Flatshare Slamdown/ Do the Right thing are silly game show podcasts.
The Guilty Feminist and Standard Aussie - often thought provoking, if not radical, magazine format type pods with great guests.
I live a podcast, me!