All of my favorite ones are banned or removed for one reason or another. For example, one _very_ niche, very entertaining subreddit is gone and it's fanbase scattered to the winds. Died of his death, unfortunately.
Ha, just the way the parent commenter said “my faves are banned for one reason or another” suggests they don’t see them as being toxic. That made me curious.
I wrote about my favorite software subs recently [0]. tldr; /r/emudev, /r/programminglanguages, /r/reverseengineering, /r/databasedevelopment, /r/esolangs, /r/unikernel, /r/graphicsprogramming.
There were a few more suggestions in the HN thread as well [1] and on Twitter [2].
Two here require some explanation:
Redscarepod is for folks who listen to the Red Scare podcast, though I’d guess 30% of that subreddit listens regularly. It’s my favorite cultural subreddit.
Streamentry is meditation subreddit with focus on attaining enlightenment.