DOOM is my GOTY, which is a complete shock to me, because when I first saw the trailers at E3, I thought it would be absolute trash. It wasn't, though the concept of glory kills still leaves a poor taste in my mouth, despite it being mostly inoffensive about taking you away from the game.
That being said, I don't have a whole lot of other games to compare it to from this year, other than Hitman(tm) Xenoverse 2, Dragonball Fusions, and Pokemon Moon.
The new Hitman Game was actually surprising great despite the DRM and episodic format, which in the end I think actually helped the game more than anything else, but I think DOOM was simply the more solid game. Xenoverse 2 was fine and all, but its basically Xenoverse 1 with some new missions and more solid controls (and bugs). Hopefully the inevitable third game will really build on the last two games to make something great. Fusions was fun for a while, but got really tedious 3/4s through, and Moon was a Pokemon game. Fun, but it doesn't stand out to me.