1 Uncharted 2 (PS3)
2 MGS2 (PS2) I think overall MGS3 is the better game, but MGS2 had a much bigger impact on me.
3 God of War 2 (PS2)
4 Conker's Bad Fur Day (N64)
5 Smash Bros. Melee (NGC)
Those were my top 5.
Honorable mentions would be ...
MGS3
Persona 4G
Devil May Cry (original)
Street Fighter 2
Tekken 5
Playstation = The Beast from the East
Sony + Nintendo = WIN! PS3 + PSV + PS4 + Wii U + 3DS