Endermen and the End Dimension

Endermen should only be able to spawn in the end. Although endermen are important for getting ender pearls, players are still able them through chests, structures, and trading. This would encourage players to actively explore for them. It would make reaching the end slightly more challenging, but also more rewarding once completed. Restricting endermen to the end would also preserve the unique identity of both the mob and the dimension. Exposing players to endermen too early in the game diminishes their mystery. Seeing them for the first time in the strange and unfamiliar environment of the end would create a much more memorable experience for new players. Alternatively, if completely removing endermen from the other dimensions is not an option, they could behave differently outside the end. They could appear rarely as passive, motionless watchers that observe players from a distance. They would avoid direct interaction by teleporting away whenever a player approached them or made eye contact. This would preserve their mystery while still allowing them to appear in every dimension and can also be used to foreshadow the end.