Grading the years
2006 - Very Good
2007 - Amazing
2008 - Good
2009 - Good
2010 - Very Good
2011 - Amazing
2012 - Weak
2013 - Amazing
2014 - Decent
2015 looks like it's going either very good or amazing.
2006
Gears of War
The Elder Scrolls IV: Oblivion
The Godfather: The Game
Zelda: Twilight Princess
Wii Sports
Okami
New Super Mario Bros.
Resistance: Fall of Man
Dead Rising
Saints Row
2007
Super Mario Galaxy
The Orange Box
Halo 3
Rock Band
Metroid Prime 3: Corruption
Bioshock
Uncharted...