Gameplay: WoW. I love how the game plays and the content. Raids, M+, and occasionally PvP.
Crafting and Economy : Eve Online. Indexing ISK to IRL Dollars was genius. Closed system.
Story : FFXIV. The MSQ is basically a full on FF RPG. It’s great.
Class System: FFXIV again. Being able to focus on one character and still try out different classes is perfect. I can only hope WoW advances like that at some point.
Novelty: Aion. Aion would have been a real contender, I think, if not for the last minute decision to nerf XP and sell XP items in the cash shop. Being able to fly and having systems to support flying is still something I wish WoW would do.