What Game dissapointed you and what surprised you most.

My biggest dissapointment ever was Devil May Cry 2 and the Elder Scrolls IV: Oblivion 

The games that surprised me most were Castlevania: Lords of Shadow and Batman: Arkham Asylum

Biggest disappointment: Age of empires 3

Biggest surprise: TES: oblivion

Biggest disappointments: Assassin's Creed: Brotherhood, Gears of War 2, Mass Effect, Resident Evil 5.

Biggest surprises: Final Fantasy VII, Tales of Vesperia, Skyrim.

Biggest disappointment: KillZone 2 and Halo Reach

Biggest Surprises: Infamous and Lost Odyssey

Biggest disappointment: Assassin's Creed
Biggest surprise: Monster Hunter Tri/Dark Souls

Biggest disappointments: Tomb Raider Games (PC), Need for Speed: ProStreet (Wii)
Biggest surprises: Torchlight (PC), Just Dance (Wii)

Biggest dissapointment: Assassin's Creed (ALL); Duke Nuken; Halo: Reach; Gears of War 2;

Biggest surprise: Uncharted (ALL); Demon's Souls; Flower; Trine; Halo 3; Gran Turismo 5; Gears of War; Valkyria Chronicles; LittleBigPlanet; Killzone 2; inFAMOUS; Batman (ALL); WipEout HD; Heavy Rain; BioShock (ALL); Street Fighter IV;

There are more...

I was surprised at how disappointing Conker: Live and Reloaded was. The rest of Micro-Rare's future could easily be predicted afterwards.

Biggest disappointments: Killzone 2, Duke Nukem Forever, Gran Turismo 5, Burnout Paradise, Need For Speed ProStreet, Tony Hawk's American Wasteland, Tony Hawk's Proving Ground (and everything that followed afterwards), Perfect Dark Zero, Battlefield 2142
Biggest surprises: Blue Dragon, Assassin's Creed, Resistance 2, Racedriver GRID, Saints Row, Dead Space

Out of the top of my head

Biggest Disappointments : Halo 3, Gears of War 2, Call of Duty : Modern Warfare 2, Splinter Cell : Conviction.

Biggest Surprise : Folklore, Fallout New Vegas ( For some reason FNV surprised me while fallout 3 didn't )