The meta-essays have got to be by far the best part of Wikipedia, even if they make it seem like all Wikimedians are 5-year-olds.
Here's a few, don't check them out, they are a massive rabbit hole.
https://wikipedia.org/wiki/WP:BLUE
https://wikipedia.org/wiki/WP:BEANS
https://wikipedia.org/wiki/WP:CITEBITE
https://wikipedia.org/wiki/WP:PLSBITE
https://wikipedia.org/wiki/WP:BRRR