Strong songs is fully listener supported with a plug to his patreon once per episode. It is a podcast about what makes some songs better than others. Best if you have some musical understandig as he can get a bit detailed.

Darknet diaries is one of my all time favorites.

If you like music analysis then Strong Songs is also interesting

And for a non serious listen I like to listen to Sherlock & Co, which is an amazing audioplay where Watson becomes a podcaster to deal with his PTSD. The adventures are self contained, so you can hop on any you like.