What weird plugins do you really like?
I'm a big fan of orange guidance tomestone. It makes a bunch of these player made messages appear all over the world, and even in dungeons. The messages are limited in scope (i.e. nobody can just write shit, they have to pick from preselected phrases) but players come up with clever things. You can even leave a trace of your character in a ghostlike form doing an emote in the location you decide to pick. I left a few in my favorite spots and hope that someday others will find them.

But yeah, more stuff like this. Not really QoL stuff but just weird things that add a bit of flavor to the game for you.