Using telnet so far and introducing my son to Moral Decay, which I played heavily from 1993 to ~2004ish?
I'm still a Wizard/admin there, and amazed it is still alive and kicking!
If you have never tried MD, it was started in 1992. It is an LP-MUD with a TON of customizations including a working economy, new classes/races, clan system, etc etc... reboots every 6 hours.
playdecay.com 3003
\/\/ulf /\/\ichaelson
{O.S.M.+}