Given the choice I'd have six 28 hour days (~20 hours awake, ~8 asleep) per week and three decent sized meals per day, the first not for at least a couple of hours after I woke up.
Constrained by the reality of day and night but without commitments to anyone or anything I usually get up around 9 and eat lunch around 2, dinner around 8 then go to bed around 2.
Now I'm working alternating shifts it's pretty messed up - if I have to be at work at 6AM I'll eat breakfast, sandwiches for lunch at around 12 and dinner around 6 but if I'm not in until 2PM I'll skip breakfast and have 'dinner' at 11 (probably 12-12:30 now I'm driving
) and sandwiches at 6 (maybe 7-8 now?) then if I'm hungry when I get home (probably won't be...) I'd have a snack around 11:30.
Some people like grazing and I'm sure it worked well when we needed to be alert to danger (i.e. didn't want to be too full and get cramp when running away from a lion) but I'd rather keep time 'wasted' on survival to a minimum so trips to the kitchen should be minimised.