Like them or not, they are here to stay. If you could put 1 and only 1 idea into an MMO and you knew it would be in there, what would it be?
This is mine: an ultimate hero. We all know there is no way we can all be the hero of the day, even though we want to be. We all can't be luke skywalker or frodo or gandolf or john connor, even though we wish we could.
After battles and stuff, there would be one "chosen one" and everybody would support this person. Of course, there would be perma-death (you die and your character dies), which would throw it in a loop. Why perma-death? If the hero is gone, the hero is gone, there will be no return unless you start the character at level 1 and rebuild him (a rebirth of the person, if you will). If you die, somebody else has to prove that they can be the hero.
There are huge incentives for helping the hero as well. Of course, the hero will be uber powerful and nobody else will be near as powerful.
Now not everybody wants to be the hero, but unfortunately, if you are the chosen one, it is your destiny, which means that if you try to login as another character on that server that you made, it switches and forces you to login as your hero. Now what if your other character needs to do stuff? Well the game designers will have to figure that out. Forcing you to sign in as the chosen one will eliminate people becoming the chosen one and then never logging in with that character ever again to save them.
"Many heroes have come before and now lay rest, but what they have lacked, hopefully you do not".
Throw out your 1 idea here. I say MMO, because I said so. I made the thread, and I want it to be on this topic.