I'll limit to 2007 to make the list shorter:
Will Buy- 27 games.
GTA IV (360 or PS3)
Super Mario Galaxy (Wii)
Mass Effect (360)
Bioshock (360)
Uncharted: Drake's Fortune (PS3)
No More Heroes (Wii) if this comes out this year.
Heavenly Sword (PS3)
Lair (PS3)
Ratchet and Clank: Tools of Destruction (PS3)
Stranglehold (PS3 or 360)
Warhawk (PS3)
Unreal Tournament III (PS3)
Hellgate: London (PC)
Blue Dragon (360)
Metroid Prime 3 (Wii)
Super Smash Bros. Brawl (Wii)
Devil May Cry 4 (PS3 or 360)
Assassin's Creed (PS3 or 360)
God of War (PSP)
Half Life 2: Orange Box (360 or PS3)
Folklore (PS3)
Zelda: Phantom Hourglass (DS)
Left 4 Dead (360)
Eternal Sonata (360)
Halo 3 (360)
Manhunt 2 (Wii) if it comes out this year
Castlevania: Dracula X Chronicles (PSP)Considering- 24 games.
Eye of Judgment (PS3)
Ninja Gaiden: Dragon Sword (DS) if it comes out this year.
Guilty Gear XX: Accent Core (Wii)
Jericho (PS3 or 360)
Monster Hunter Freedom 2 (PSP)
Mario Strikers Charged (Wii)
Kane & Lynch (PS3 or 360)
Guitar Hero III or Rock Band (360 or PS3)
Lost Odyssey (360)
Resident Evil: Umbrella Chronicles (Wii)
Army of Two (360 or PS3)
Batallion Wars (Wii)
Mercenaries 2 (PS3 or 360)
Naruto: Rise of a Ninja (360)
Haze (PS3)
Jeanne D'Arc (PSP)
FF Tactics: The Lion War (PSP)
Persona 3 (PS2)
Beautiful Katamari (360)
Silent Hill: Origins (PSP)
Burnout 5 (PS3 or 360)
Nights (Wii)
Alone in the Dark 5 (360 or PS3)
Parappa the Rapper (PSP)
Thanks to Blacksaber for the sig!