Ahh, BatMUD. I played it years ago, like 96 - 00 or something. I was still a kiddie, so grinding for experience and stuff was fun at the time. The game had a very large world, variety of guilds to join, occasional special events (like pigeons from HELL occupying the town square in the main city and killing even high level characters), crafting, possibility for characters buy, own and build their own settlements etc.... All the stuff you find from MMORPGs nowadays and more.
Higher level characters ran settlements and castles, rented rooms to other characters to safely keep their stuff in. Other characters of course tried to raid those settlements and castles to steal the stuff and murder other characters. There was a special guild for assassins. Other players could post bounties anonymously to off other player characters. Assassins would then go after the victims in a special anonymous, disguised form. If they managed to kill the target, they'd get the bounty. There were a lot of players around (for a MUD), often hundreds online at the same time.
In the end I gave the game for two reasons. First, it started getting repetitive. Grinding, grinding, grinding - or in the case of a healer, resurrecting, resurrecting, resurrecting. It was like playing a roguelike, just with more work and less fun plus it cost money during the modem days. Second, there was the social aspect that became annoying. Mainly, there were always some idiots with their pissing contests and rules were not the same for everyone. The administrators clearly favored certain people while enforced the rules to the last comma with others. In a game with unrestricted PvP save a few spots in the entire world, this was quite annoying.
Oh well, modern MMORPGs are pretty much what BatMUD was years ago, just with graphics glued on. Grind, grind, grind, join a society, do raids, PvP, grind grind grind. So I suppose if you are crazy about WoW or something, you might like BatMUD. In my case I lost my appetite for that kind of stuff years ago. I don't feel like playing anything that feels like a second job and where the most important thing is how much time you can pour in the game. (Unless you cheat and buy stuff online.)
Keep in mind I played the game like ten years ago. I have no idea what BatMUD is like these days. I'd imagine it has improved in content since, even if player base has fled to the online games with graphics.