A lot of the writing focused ones end up MOOs/MUX/MUSHes. The reason for these is that these center around roleplaying more. For example, a player has a handgun, which gives a +3 to ranged combat mechanically, but it's up to the player to define it as a Colt or a Glock or some pew pew laser. MUDs are more gamey.
A good deal of these also end up being adult or at least having horror levels of adult content. It surprises me how many teenagers are actually on some of these. Many seem to be blind, so I guess they can't pick up Roblox as easily.
I'd name names, but yeah, I'd have to check that they're clean enough to recommend.
One name is Armageddon MUD. Brilliant writing, haven't found a MMO that's as fun. Many of the mods and players are professional writers. But everyone is an asshole - it's out of character to be nice, which is what makes these games hard to recommend.
If you want an IF, I strongly recommend Adam Cadre's stuff: https://adamcadre.ac/if.html