I have the opposite problem. After a quarter-century of more night shifts than days, and a decade of constantly rotating shifts, my body has no set pattern. I can still go days without sleep, or conversely hibernate for fourteen hours. That latter is problematic. I need an extra alarm clock for insurance.
My appetite is similiar. After having done one extended fast, and numerous shorter ones, at a moment’s notice I could fast for a day with no real problem. (Anything longer and the caffeine withdrawal is murderous. You have to taper down prior to an extended fast.) Unlike my sleep “cycle”, I’m grateful for the food one.
How about you guys? Any bio-oddities?