Kingdoms of Amalur: Reckoning is an example of why sometimes less is more. This game quite possibly has the most content I've ever seen in a single-player game and yet... there's no real incentive to play through more than half (!) of its content. The devs made it clear that this is a preview of what's to come down the road (an MMO in the same universe) and what's obvious is that this could've been a great MMO, but as it stands now, it's ''only'' a solid single-player experience.
Pros: Astonishing amount of content, great and flexible combat system, creative visual design, superbly realized world, some interesting quests
Cons: Feels like playing an MMO without other players, music is barely noticeable, mostly uninspired writing and voice acting, uninteresting characters