I'd totally play WoW if I hadn't to level a char to the cap for it. I'd enjoyed some dungeons to run it multiple times but NOT with the same character.

As it is right now, I'm tied to a single class and there is so much stealth+opener+finisher you can do as a rogue before it stop being fun.

I don't expect WoW to change it's formula thou, but perhaps future MMORPG will break away from the vicious gripe of levels and grind.

If not, well, there is always DOTA and TF2.