Play it because you're bored.
I still don't understand why it costs so damn much to buy this thing when it pretty much comes standard with any 360 you buy, and you also have to buy half the games in order to unlock them. So, please explain to me why I have to pay $40 just to spend even more money to actual play the games?
Anyway, this is something you play because you are bored, because you are waiting for another great game to be released, because you don't have live (my ethernet cable doesn't reach, however, I am in the process of buying a 50 ft one), and because you are too hungover and/or lazy to put much brain power or effort into anything else.