Are you a lark, someone who likes being up and active in the early morning? Or are you a night owl, someone who tends to wake later and perhaps gains energy and focus as the day progresses, someone who likes to work (and play) in the evening hours?
Besides eating whole foods and moving your body, getting enough sleep is the most important thing you can do for your health. Sleep deprivation makes you fat and leads to depression, diabetes and pain.
As a couples therapist I've observed that when a couple is angry at each other, one partner often deals with it by avoidance and falls asleep while the other glares, sometimes feeling the urge to smack 'em.