For the platforms I had last generation ( since there are too many to choose from I’m having a run up for each).
PC
Winner: Dust: An Elysian Tail.
Runner up: The Banner Saga.
Xbox 360
Winner: Blue Dragon.
Runner up: Dragons Dogma.
Wii
Winner: Monster Hunter Tri.
Runner up: Xenoblade Chronicle’s.
PSP
Winner: kingdom hearts birth by sleep.
Runner up: final fantasy 7 crisis core.
DS (this is a particularly hard one).
Winner: World Ends With You.
Runner up: Ni No Kuni.
Honourable Mentions: Monster Hunter Freedom series, Borderlands series, Tales Of series, Mass Effect 1, Lost Odyssey and Golden Sun Dark Dawn.