I would say Elder Scrolls Online.
Great story and gameplay. It is "almost" like you are playing a RPG like Skyrim. Tons of quests, all of them are voice acted. You don't need to rush to reach max level or get best gear to do stuff. You can do whatever you want, wherever you want, whenever you want.
All of the contents are rewarding. "Best gear" for your spec may drop from a chest in a random area. You can sit back and enjoy the game without stressing about anything.