Halo is great.
I'm sorry if you all disagree, but it really is a grand ole time.
And NO, Halo, isn't the only game I play. I actually dont even own an XBOX, I have a gamecube.
The reason I say Halo is great is that my friends and I have gotten together and played hundreds of hours of halo, and NO other game. If Halo has the power to bring us together again and again, it must be doing something right.