RE: Butcher fast or hang???
I butcher as soon as I can. Sometimes I let the deer hang for days but only because I can't clean them right away. I never try to age meat. Proper aging requires a controlled environment. Hanging a deer outside in changing temps and sun / shade will never age meat properly.
I might be wrong but I don't think aging meat has any effect on the taste. I believe aging only tenderizes the meat.