[Rygar]

WoW had plenty of "original ideas" if anyone can really say that in a fantasy setting (meaning everyone copies from D&D)

But to name a few: using a separate stat (resilience) to balance PvP play and not unbalance PvE, battlegrounds, quest exp system was very intuitive to new players, economy super well balanced (best I've seen in an MMO), stat tree allowed for a single class to function based on how you prefer to play (i.e. shaman could be a healer, range DPS, or melee DPS), armor enchants, trade skill system was integral to raiding, instancing, griffon travel, character fashion quest customization, etc.

And lest not forget a true "good vs. evil" system where you couldn't even group or communicate with the opposing faction.

Shame on you for playing Alliance (and making this thread)