This.
I had some fun with MMO's when they were still new and fresh (ie the starting hours of the game).
In the end they all bog down into a grind, with an endless repetition (WoW's daily quests anyone?)
Next to that too many MMO's focus on the 'endgame', meaning you have to grind for a few hundred hours before you are finally allowed to play 'they way we intended the game to be'.
Next to that, almost every MMO looks the same, especially HUD-wise, and plays the same.
Age of Conan did something with their fighting system to make it more interesting ( you having to direct every blow instead of an auto-attach option leaving you in much more control ) but the rest of the game is pretty much the same as every other MMO which means that in the end it still becomes ****ing boring.
I have tried more then enough MMO's, and now i can safely say that there isnt a single hair on my head thinking of ever touching any other MMO ever again.
Not even with a 10 metre pole, not even if i got paid to do it. Let alone to pay for it myself each month. There are better and more fun ways to earn my money, like standing on the back of a garbage truck emptying trash cans.