Well personally, I played runescape a lot longer than I played wow. All in all I would have to say I had more fun playing wow because of two things in particular: 1. Choices mean something. You choose a class and you are that class, same with race and to a lesser extent your talents and professions(which can be changed at a price). 2. Group dynamic. The game can barely be played alone, if you want to do any of the really fun/hard stuff you'll need to find a party to help. EDIT: Make that three...I really enjoyed the wide variety of weapons, armor and other items.