i've worked almost all shifts (hospital) and for me, the 4-12 was good. i got a lot of stuff done at home b/c the dog needed to go for a walk i was up by 9, i walked alex, got to exercise, cleaned house, made crockpot dinners, made appointments. the 2 things i'd mention as problems, 'k 3- too much late night tv sometimes, hard to get together with girlfriends, and packing lunch, eating after 8 pm was hard, i'd be hungry, but heavy food made me loggy, so i ate soup and salads alot. i got tired of soups, so i crockpotted a lot of stuff when i got home, then when i got up at 9, i'd pack lunch for that night. hope this helps