This sounds to me like a huge disadvantage. I have what I thought of a terrible sleep hygiene too but after several years of watching collegues adapting "new w

This sounds to me like a huge disadvantage. I have what I thought of a terrible sleep hygiene too but after several years of watching collegues adapting "new ways to sleep", I realized it's not that bad at all. So me (and my girlfriend) usually stay up long. Midnight to 1am is normal for a weekday. 1-2am is the time when we say: we should have been in bed already but it happens more often then I thought. We get up at 7:30 on 3 of 5 days and 6:30 on the others. Obviously this shouldn't be enough sleep and it isn't. We both get tired sometimes somewhere around 6-7pm where we sometimes take a nap (usually on the 6:30-days) of max 1h. Sometimes we break it up early. On Friday we stay up as long as we can and sleep as long as we can and want on Saturday. Same goes for Sunday where we stay up to ~2am until the late NFL game is finished. It works pretty good I must say. I don't drink coffee or take any pills, energy drinks, whatever. I can sleep pretty good on the train or plane for some bonus hours and fall asleep instantly when I get into bed. I can even go to sleep early or sleep through a whole day if I'm sick and I think there is nothing better to do (but being sick is very rare for me. I was sick one day some weeks ago. Slept through it almost completely. Got up just to eat and pee). I would never want to miss the flexibility even if it's unhealthy or whatever.