I didn't find any particularly worthy of the title. I haven't played ROTTR yet, but Fallout 4 wasn't totally amazing, LiS is highly dependant on your personality, ASS is great but not that many people like it, Halo 5 was genuinely fun as hell, but I didn't like the multiplayer. I have no experience with The Witcher 3, though people are talking about it like it's the second coming of Christ. Rocket League I didn't like. Splatoon people are in love with or they think it's dumb.

It seems like this year there are a lot of 9/10 games, no 10/10.

All in all, I agree with you based on what I played almost down to the letter. IDK if I have a personal GOTY...but if I do it's probably LIS.

Just pitch perfect action gameplay, even on a phone, and the design addresses some of the core issues that Rogulikes always have (weak intros).

Still haven't beat it yet, I've brought the last boss to his final stage but I just couldn't go the distance :(.

I actually agree with the "official" pick of the Witcher 3, despite never actually finishing it. It's still on the list (The Taken King got in the way, and I haven't made time to go back to it, yet).

Despite the fact that I'm getting more than a little weary of open world games, The Witcher 3 is a nearly perfect example of one. It really does it right. The world is very large, but has lots of unique and interesting areas, and is truly gorgeous (just barely loses out to Rise of the Tomb Raider for gorgeous vistas, for me, but Tomb Raider isn't anywhere near the size of the Witcher). I'm only about 50% through the main story, but it is varied and interesting, and it has the best side quests of any game I've ever played. They're all worth doing, which is a large part of why I haven't finished. I'm usually not a completionist and am okay with skipping side content, but I have yet to do any mission in the Witcher and leave it thinking it was a waste of time. The relentless updates and support from CDProjekt Red was amazing.

It's just a damn good game, but it's one that requires a bare minimum of 50 hours, and that's absolutely blasting through the story, judging from my experience.

I bounce back and forth on Fallout 4. I truly enjoyed it while I was playing, but I put it down about a week ago. I took my second character about halfway through the story again, then put it down. I haven't felt any desire to go back to it. It just didn't capture me the way Bethesda games usually do. I've put well over 200 hours into every Bethesda game since Morrowind (200 hours is the minimum for those games, I put well over 1000 into Morrowind). I don't see the same happening for Fallout 4. It's nowhere near my game of the year, even though I didn't even play that many games this year.

Rise of the Tomb Raider is a great game. I'm not quite finished with that yet, either, but it has been amazing. Just an all around fun game. My biggest complaint with it is that the platforming makes me wish we had a new Prince of Persia game to play. :P

Halo 5 is likewise a great game (in my opinion). I think 343i nailed a lot with it, and solidly set Halo back on the right track. The gameplay is tight and fun, I think the story was interesting, and the multiplayer is great and seeing frequent updates and content drops. Sadly, I haven't played it as much as I want. I played some BTB last week just to check out the new maps, but that was my only play session in about a month. I'm going to have to try and make some more time for it in the near future (maybe after SRL is over!), maybe jump in on some HBO custom nights or something.

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I've not played half as many games as I'd have liked to this year on account of Destiny, but of the ones I did TftB is a standout for me. Technically only 4/5ths came out this year, but thats good enough for me.

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In a market over-saturated with zombies and other co-op games that vie for players' attention, Dying Light stood out.

It may not have been a narrative masterpiece, but the story was engaging and straightforward.
It may not have had bleeding-edge graphics, but the world was expansive and beautiful.
It may not be a lot of things, but for me, it was the two most important things: rewarding and fun.

Dropkicking a zombie as it chased your friend across rooftops? Priceless.
Igniting a flare at the last moment before you and your teammates were swarmed by Volatiles, then planning your next path as you regain stamina and the flare dies out? Intense.
Joining a random group of people, and terrorizing their game as a super zombie while they struggle to outwit you? So satisfying...

Dying Light is great, and the support that Techland has shown it is inspiring. Heck, they made a clever jab at Destiny's Red Bull promotion this year, then turned around and actually made free DLC because of it.

This is a game that I just absolutely loved from beginning to end, and the thing is that the "end" was hardly the end. I can't recall a game that has had so much stuff added to it post-launch (besides Warframe and Helldivers) without requiring players to buy something extra.
And the funny thing is that the game does have a Season Pass, which had a solid amount of content, but Techland has been working on a pseudo-sequel to the game, and instead of just charging players separately for it, they added it to the Season Pass for no extra charge to current owners (and they have given people a window to get it free if they don't have the Season Pass yet), and it looks crazy good:

(The new playspace is reportedly bigger than the main game's two current playspaces combined).

A real underrated gem.

PS. The game also has one of my absolute favorite trailers:

As for other games, The Witcher 3 is real fun, but I'm only about fifteen hours in, but I really dig it. It's like Fable 3 for grown-ups, and I'm addicted to the in-game card game, Gwent. I'd be down for playing it IRL, even.