It's tough to pick!
So, the two games that really connect with me the most were ABZU and The Legend of Zelda: Breath of the Wild. So it would have to be out of those two, but I guess it has to go to Zelda, since that game just has so much unexplored potential and cool mechanics discover. Seems like it's a game I could put so many hours into and get invested in. I really love the fresh appeal of it, compared to previous titles.