CAL4M1TY on 16 October 2008
I bought one originally because it clearly has the best games library this gen (so far).
Whilst it might not have the best game this generation (it's a matter of opinion), it has the best diversity and there is basically a AAA title to fill every genre (which neither the Wii or PS3 can boast yet).
Also, online is much better on the 360, more content and more users, which means more people playing online in my country, which means less chance I'll end up in a laggy game.
