FFXV. Mainly because I was really enjoying it at first, but the longer it went on, the more I realized that's all there was. For example, the world felt very small. Late in the game, I'm still doing missions in the opening area, and spending min doing nothing but watching the scenery go by as I travel there (Or watch a loading screen). I felt the story was a mess, and while I enjoy the main group well enough, their designs are too similar, and there's only 4 of them.
Also, it makes me worried about the FFVII remake. They're obviously going to take peoples responses from this and incorporate them into the remake. It's already pretty similar based on the gameplay trailer we've gotten, and some of the later sections of XV may as well BE parts of VII.