Top games for me was Subnautica, Warfame, Smash Bros Ultimate, Monster Hunter World and Final Fantasy 15.
My best game though, even though the 2 DLC for it got canceled even though it REALLY needed the one, would have to be FF15.
Subnautica was great but you sort of run out of things to do after you play through it once and play creative mode, Warframe has been a blast but is by far the grindiest game I've ever played. Smash Bros is good as always, but also has that problem of feeling like you've done everything after you unlock all the characters and finished the story mode thing and Monster Hunter World was great but started to fizzle out near the end of the year (though looking forward to the Expansion coming next year).
Even though if the ending for FF15 was REALLY crappy, the rest of the game reminded me of what playing a game for fun was like, back before I started playing primarily rage inducing games like League. I could just to sit back, relax and enjoy the scenery. And even though Square decided to stop production on the DLC that could have fixed the ending, I still enjoyed it and I'm looking forward to the Final Fantasy 7 remake that will be done in a similar style.