I worked for 6 years in a 100% remote position, 3 timezones away from my employer, so as such, I kept a loose schedule. Eventually, I adopted the practice of just going to bed when I was tired, and waking up whenever I woke up. Sure, sometimes I was woken up by noises outside or what have you, but when I'd wake up on my own, usually it was between 4.5 to 5 hours from when I went to bed.

I wasn't going to bed at regular hours, and I wasn't waking up to an alarm, so I guess I am in that group (also, I don't have increased aggression or impulse control, but I don't know how I'd measure empathy). That said, I did not realize that I was statistically rare, so thanks for pointing out that maybe my 5 hours a night advice isn't applicable to others. Regardless of the amount of time involved in sleeping, I still would prefer not to have to take it, if that were an option.