I have playd Halo 2 on various occasions with a friend of mine. I have a Gamecube as opposed to an Xbox primarily due to my being a Nintendo loyalist for many years having classically trained on the 8-bit system back in the 80's. However, on Halo, I generally get my butt whipped on a consistent basis. Something about the game simply escapes me. Worst way I died? All of them.
I even borrowed an Xbox for a time and played Halo. Did pretty well aginst the computer and really racked up the levels. Then armed with my new experience, went against people again. Better, but still slimed. Oh well.
Then again, I tend to clean up on cerebral adventure puzzlers like Metroid Prime, but when it comes to first person shooters, I'm not so good. So I return to my computer and write another script, where I am in total control and people do what I say.