The whole motion control crap.

Sixaxis
Lair
Vita
FFXIII & XIII-2
PSN
Rare
Kinect
All Kinect games
Move
Halo 4
Playstation All-Star Battle Royale

Absolutely Rare. They just went from awesome to gruesome. How the hell could they be sitting on a minegold of franchises like that and manage to screw everything up??

the story dissapointed me, too many things was solved with nanomachines. Raiden's, meryl's+captain diarhea character arc's were not really how I wanted the characters to go whatsoever. 

I know a lot of people like it. But it's not what I imagined or wanted it to be at all.

Add in the aweful install screens, and a higher cutscene ratio with extremely tight awesome gameplay and that's my feeling.

Motion controls are the biggest. Then too many Call of Duties. Someone else posted how Activision oversaturated the music games. I agree with that. Those games were fun but once they started released 7 of them in one year I stopped buying them and ended up not playing them anymore.

Diablo 3 was my largest disappointment

Spore
Fable
DiRTification of rally racing.
5 broken consoles in 1 gen.
Games leaving to handhelds (Valkyria chronicles, Paper mario)
Skyward sword

Too many to list but just a taste:
Motion controls too early
FFXIII
FFVXIII not releasing
Halo 3
Diablo 3
WoW cata xpac
HW failure
Skyrim
Twisted Metal online problems
DW 6, ROTK XII, SW 3
etc etc..

JRPGs

Its not the quality of the games per say, but the quantity and the quality. Feel like the entire genre just took a step backwards this gen. Without the handhelds, it would have been even worse.

No new "real" Suikoden really bums me out