Kinda shocked not to see 2008 up there.
For me, Valkryia Chronicles, Metal Gear Solid 4, Rock Band 2, Wipeout HD, Dead Space, Burnout Paradise, Soul Calibur 4, Resistance 2, Bioshock, Prince of Persia, DMC4, BF:BC, LBP, Motorstorm: Pacific Rift. Mirror's Edge, Eternal Sonata, Hot Shots Golf. Wow, as I went and looked up some of these games, I was shocked at how many great games released.
Plus GTA4, but I'm not big on that.