Holy shit, NieR made it! I panicked for a bit thinking it might not show up at all.
There's a lot I can say about NieR and why it's my #1 pick, but it's one of those "you have to play it to get it" kind of games. Akin to VR.
Similar to what @Crepe said, it felt like an experience tailor-made for me. Before playing it, I picked up the original Nier and played through that. I think If I hadn't done that, Automata might've surprised me even more as there are a couple of plot points being resued in here. It didn't really bug me though as they still hit hard as fuck.
Anyways, I think the people who voted for it (thanks for doing that) and commented here did a good job of highlighting what I like about it and why it's so special.
If you have shied away from Automata due to the "anime aesthetic," please do yourself a favor and just try it out. Trust me, you haven't played anything like it.
Square Enix struck gold by giving Yoko Taro another shot at making a game. The guy is a mad genius and I truly believe NieR: Automata is a one of a kind experience and has opened my eyes to the capabilities of storytelling in video games.