This gives MUDs their sense of place. Players return again and again to catch up with friends. Also, players maintain their identities from one session to the next, distinguishing a MUD from a typical video game. The relative permanence of MUDs and user identity gives players a chance to familiarize themselves with their environment and each other. Beyond this, it also lets them define their own on-line identity.
Domains require players to use avatars.
Long-term use of an avatar allows character development and has an impact on the political structure of the MUD as well. To better understand MUD society we should look at the reasons why they are so popular. Even in more socially benign domains an element of competition remains. Long-term citizens accrue power and influence by rising in the MUD hierarchy. Other players extend their social lives through the MUD environment.