To be fair WoW has high end content (Strat/Scholo/BRS/DM don't count).
40 man raid content like AQ, BWL, MC all require that every single person in the raid knows what they are doing and does it well. 20 man raids like AQ 20 and ZG are the same. Lots of strategy and team work and a blast to participate in. Other than 40 man raids though it is lacking. Crafting is so simplistic, BG is fun but can become a grind,, no mentor system to help friends, nothing to unlock etc.
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Bode - 100 Holy Paladin - Lightbringer