Hey, Mr. Hardcore Gamer: When you update your Xbox this November 19th, but you don't want to have an avatar, because little cartoon representations of yourself are for babbies, you're out of luck. You will be required to choose an avatar.
But don't worry, according to Microsoft says it's possible to make an avatar that is "badass," plus, you can choose a pre-made one at random and never use it--but we have a feeling you will give your avatar a spin when no one is looking. No matter how hardcore you say you are, you won't be able to resist the urge to play with yourself!
Another interesting piece of info about avatars: Although clothing and accessories will be free at launch, they may start charging as time passes.