That is one tough question. My favorite games are the following ones:
-Wind Waker HD
-Mario Kart 8
-Bayonetta 2
-Smash 4
-MH3U
If i had to vote for one, it would probably be Wind Waker HD or Smash.
Xenoblade X has a real chance to take the top spot though. (We will have to wait and see :D )
Playing: F1 2016 (PC), Uncharted: The Lost Legacy (PS4)
Watching: Hajime no Ippo, Attack on Titan (4th time)
Upcoming purchases in October:
-TBD