I mean, there are a lot of things to do solo in the game - Farmville, Pet battles, dailies.
Don't you sometimes feel like just going out in the world and mindlessly kill mobs without having to do only the few things the game expect you to do, like the the 3 activities I mention above?
For me that is the only thing that WoW needs to make it even better. Some sort of reward for just going out there and killing mobs of the appropriate level. A reward like faction reputation (to the daily cap, of course) without the need to do dailies.
I know most people hate grinding, but I would love for the option to be there...