Non-24-hour living
As far back as I can remember, I always had trouble getting up in the morning... and no trouble staying up during the night. During the years I went to school - and the brief time in my late teens when I actually worked in an office - having to get up in the morning was, without exception, horrendous. It was due to the experience of these years that I thought I hated mornings, and it took me a while to realize I really don't. I actually love being up and alert when the sun is rising, with the streets still calm as night, when nobody is yet up. I really don't mind getting up at that time, either. I just absolutely can't handle a 24-hour sleep cycle. Early in my twenties, I started to become less dependent on other people's schedules, but I still tried to keep a 24-hour sleep cycle, because that's what you are supposed to do. I would still try to get up at about the same time every day, but the time kept slipping. Getting up at 10 am turned to getting up at 10:15,