there not important to me at all until I've atleast finished the core game, after that they add a nice reason to replay the game, although I've still never got all the trophies/achievements on any game apart from trials hd which was an arcade game
End of 2012 prediction:
xbox 360 : 73-75 million playstation 3 : 72-74 million wii : 104-105 million
Most hyped for :
Bioshock: infinte, The Last Of Us, Alan Wake's American Nightmare and Agent