The only podcast I was able to listen for more than 3 series was BBC: mostly “history” and “life stories”. Over the last ~10 years I tried many others, but nothing clicked for a longer engagement. A few months ago I stumbled across Adam Gordon Bell’s corecursive. My first episode was with Richard Hipp, the creator of SQLite. It was great. The second one was with about zig. The average episode is so good that I just downloaded them all to slowly go through them.