My english is not so perfect but I would like to comment your very interesting post. During all my professionnal life I've tried to respect my own rythme because my body was ill if not. I've tried to work during the day, the night (was a wonderfull experience), being independant, etc... Today I always try to respect my rythme which is changing with years, adaptation again adaptation. I think this is one of the best thing we can make for ourselves, respecting our own natural rythme