Been playing MUDs for about 14 years on and off before eventually not bothering to play.
But I got talking to the admin of dark wizardry recently and tried his MUD out and I have fallen in love again with Multi-user-dungeons.
The area's are well thought out, mobs have something to say and a lot of fantastic mprogs that make the game feel more alive and unique.
Every time I play, something makes me laugh like the statue that wants a snog in exchange of blessings, lol
All the players I have met are also very helpful and friendly.
if you're looking for a chill mud with friendly staff and players with a lot of content, quests, areas, and items etc come try it out they also have a custom mushclient which some useful features like a map and chat window.