My favorite so far has been Invisibilia which resulted in me binge listening to all 7 episodes in a matter of two days. Invisibilia looks into the psychological strangeness of life and us as beings. It is interesting because it uses research to delve into the why's and what's of strange things we experience that we don't realize are even happening. One of the episodes focuses on why people feel better in "categories" and other's explore fear, what would happen without it and why we experience it.
What Podcasts do you love?