Game of the Year
Can you believe this is made by one person? A lot of care was put into Stardew Valley and it shows. Sure some things are lacking but you'll be hard pressed to find a more comfy game. Plus, a Harvest Moon-like game on PC and now on consoles. Hell it's going to be on the Switch, a platform that should be Harvest Moon's successor's home turf. Anyhow...
Surprise of the Year
GOTY material for sure but seriously, id pulled off a modern Doom game. Prior to release it was a big if if this was going to work. I was sort of a believer but the multiplayer (by another studio) immediately before release didn't give any hope of it being the case. And hell, arena shooter might have to wait for the new Quake game to see if the old school MP genre can make a modern comeback like SP Doom has.
Disappointment of the Year
I went in without much expectation and left disappointed. While the game can be fun in the exploration sense but the game was a steaming pile of shit performance and graphical fidelity wise. It remains to be seen if the Foundation Update can provide much of a... foundation for this game to reach some of it's potential since again, it can be fun when things comes together (got chased by T-rex like creatures on one lush tall tree filled planet and experienced the power of Skynet and it's Metal Gears on another world).
Favorite Moment of 2017, Surprise Numero STORM TEAM of 2017 and Real GOTY 2017
EDF! EDF! EDF!
Most Anticipated of 2017
Everything looks wonderful so far since it just improved on the first game and its expansions so much.