My preferred way to browse here is using All and blocking communities I don’t want to see. That way I get exposed to new things I wouldn’t seek out on my own (for example: British archaeology)
I accidentally blocked a community while trying to block a user and when I went to unblock it, I saw I had 1250 communities filtered. If I had to guess, 90% are either porn, sports, or anime.
What about you?
700 at last count
I block all communities based around a single sports team and most sports, also any based around a geographic location smaller than national-level. Anything based around a state, city, town etc is always negative.