There's a reason why over 6 Million people play WoW.
Yeah, there is. Becuase nothing better is on the market. If you want my advice don't play WoW unless one of the following options are present to you:
-You have many friends playing
-Your willing to PvP
-You know that once you hit 60, the game becomes stagnent
-You like Raids, becuase thats what the game is post level 60.
I like WoW, to some extent, in many ways it's a tedious poorly designed game, not poorly designed as in the game mechanics but as in the content is poorly thought out. Or rather the effects it has, I don't think Blizzard intended the PvP honor system to turn out the way it is, a 24 hour grind fest.
And if Blizzard seriously think they can keep dishing our raid dengeons to keep us happy then their sorlely mistaken.
To be honest play what interests you the most, no one esle can really make this desicion for you.