What xbox 360 game should you get

Well, nobody can tell you what you 'should' get but people can recommend...

Bioshock 1/2
Mass Effect 1/2
Oblivion (expansions)
Fallout (expansions)
Left 4 Dead 2
The Orange Box (Team Fortress 2, Portal, Half Life: Episode 1+2)
Assassins Creed 2
Borderlands
Colin McRae's DiRT 2
Forza Motorsport 3
Project Gotham Racing 4