But instancing can cause problems, too. One criticism of City of Heroes was that mission maps were always instanced, creating a sense of discontinuity. Age of Conan, too, has come under fire for overuse of instancing, particularly in PvP zones, where it used to be possible for a player to make a nuisance of himself in one instance and then vanish into another to avoid pursuit.
So, what sort of content should be instanced? Is there such a thing as too much instancing, or should more games be like Guild Wars, which instances just about everything? Does instancing drive you crazy, or make you sigh with relief?