I cannot do it because of my job and my kids, but if I was retired or independently wealthy without kids, I would sleep from about 2-3 am to almost noon. I don't like waking up until the sun is decently up in the sky, there is nothing worse than waking up before dawn, when it is still dark and cold. I wake up early anyway, for the last 20 years because of my job, but ai still hate it, it is something you are born with, I swear.