Eh. Pretty mediocre game. Sales seem about right considering how much money they invested in marketing and promotional material.
I mean, taste is subjective, but either you have a narrow sampling of the generation or you are a crazy fanboy.
I could accept it as someone's game of the year, but game of the generation??
Edit: that was a jerky coment. Sorry Vinny. You do you.
For what it's worth, I play virtually every major title, and most of the more talked-about indie titles every year. So I've got a wide breadth of experience.
But yes, I absolutely am a fanboy. FF is my favorite series ever, and with XV, I just let myself soak in it. I didn't fast travel, I tried to make camp regularly, and played the game as it felt like it was meant to be played. I loved virtually every moment of it, and at least for me, when my main complaint is "I want more", that's a high mark.
As for the rest of the generation, Witcher 3 and Fallout 4 were big for me in 2015, but I liked this more than either of those. Dragon Age 3 was my GOTY in 2014, but again, I liked FFXV more. I can't recall much of note from PS4 in 2013.