I would say FFXIV though I didn't play it. It was disappointing enough to make me not want to play it when I originally was very hyped up for it, let's put it that way.

Of games I did play I will have to go with The Legend of Zelda: Spirit Tracks. Just a very meh entry into the series. I really hope this is the last cartoonish style of Zelda because I'm getting sick of it (though Toon Link in SSB Brawl kicks ass).