both services are good for different things . I like psn because it has a web browser and user generated content (littlebigplanet , modnation racers etc) , but i prefer live because it has a bigger variety of games and DLC to download , more of my friends have it and I personally prefer the online shooters on the Xbox like gears and halo .
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