This is a question i wish a representative of SE to answers me, are developers planing onto some sort of benefit or not even a benefit but give us something we can use as a "reason" to have more than 1 character?, as right now we all know there no real reason to have more than 1 single character unless it be to play with friends in diferent worlds.
Examples of some reasons they could give us to play multiple characters but without make it a "MUST HAVE" (yes only examples);
1.- Have 1 character peer world and use it to interact betwen all world's in any way like lets say sent items cross-worlds betwen our own characters? (tbh i think this be a bad idea for multiple reasons like the mess up on world's economy but who knows maybe it be allowed in a similar manner but for unique and untradable gear or something else,im just givin ideas)
2.-Allow us to pick one of our characters to log in as it, and use other of our characters in that same account as a NPC fellow (allowing us of course to interact with it at certain degree like selectin its job and gear and maybe a "behavior"). who knows?, maybe it could even be a more advanced kind of "mule character" for when you play gatherer classes by havin your secondary character follow you and hold items for you for extra space.
3.-View story of a certain content like quest or seasonal events from diferent points of view. hell i would like have a bad guy and a good guy characters.
4.-Make critical decicions that affect deply your character development/growth you cant undo or redo on 1 single character. Like lets say you get forced to take a decicion that will give you as reward some amazing ability/spell suitable for only 1 job and you wont be able to change or pick two afterwards, so every char you make can have diferent abilities specialized. (however i dont really like this last idea either strictly as it sounds, but is just an idea)
Anyways to make it short... will Developers give us a good reason to use multiple characters? This a question i wish Developers answer to us, not speculations from other gamers, however yes i would like hear the opinion of everyone about this.
Im talkin only for me self when i say, i wish they gave us a reason to play diferent characters that dont affects the gaming of those who decided play only 1, but still give us the satisfaction of play multiple characters beyond the reason of do it only to have a diferent lookin character.