One of my favourite games of this gen. If you don't like the game then you have bad taste and should probably stick to chav games.
Bare in mind that the last traditional JRPG I liked was Skies of Arcadia, I don't tend to get on well with them in general. But yeah, Nier did absolutely nothing for me.
I'll just pick game series I liked this gen rather than five separate games as that's way too hard for me to do.
Halo
The Witcher
Deus Ex
Mass Effect
Phoenix Wright
Since five is too few, Bayonetta, Vanquish, Assassin's Creed, Left 4 Dead, Minecraft and Audiosurf deserve a mention.
And for biggest disappointments:
Splinter Cell Conviction (OK game, bad Splinter Cell game)
El Shaddai (boring gameplay but beautiful)
Rage (driver issues pissed me off and by the time I got it working, wasn't worth the wait)
Alan Wake (not awful, but felt extremely repetitive, the DLC was better than the main game)
Child of Eden (Rez is better)
Fable 2 & 3 (games getting progressively worse)
Dragon Age 2 (shit mountain, nuff said)
And some dude is crying on 606, heartbreaking.