You aren't truly a non-morning person, I think, because it works for you. You might not like mornings, but it isn't wired in as it is in some of us.
Waking before 8-9am seriously affects the very quality of sleep. 8-9am takes a little attention to my sleeping and continued use of an alarm clock, but I can get a decent enough sleep. At 6-7am wakings, it is doable with a great deal of work. I then continually run the risk of oversleeping sporadically (I often don't hear alarm clocks early in the morning). Sometimes I'm just wide awake after midnight even with continued waking. Outside of taking sleeping pills, I'm not sure how to combat that.
I worked exactly one job that started at 4:45am and had to quit due to lateness. I physically couldn't do it. Half the time the alarm wouldn't wake me. I can do this occasionally for a couple days at a time, but it is rough. I'm much better working overnight than early mornings. I used to get told I'd grow out of it, but I'm 38. I don't think I will.
I feel like you about the 6-9 period, and I still prefer and fall back to getting up at 9 (or later if nothing stops me).
But if getting up late is not an option, 3am beats 6 or 7 am for me. Which is a solution for times when I have to do something early.
But again, just my personal experience. Everybody is different, and nothing is worse than telling other people "oh, you are doing it wrong, just do X and be a normal person!"
Waking before 8-9am seriously affects the very quality of sleep. 8-9am takes a little attention to my sleeping and continued use of an alarm clock, but I can get a decent enough sleep. At 6-7am wakings, it is doable with a great deal of work. I then continually run the risk of oversleeping sporadically (I often don't hear alarm clocks early in the morning). Sometimes I'm just wide awake after midnight even with continued waking. Outside of taking sleeping pills, I'm not sure how to combat that.
I worked exactly one job that started at 4:45am and had to quit due to lateness. I physically couldn't do it. Half the time the alarm wouldn't wake me. I can do this occasionally for a couple days at a time, but it is rough. I'm much better working overnight than early mornings. I used to get told I'd grow out of it, but I'm 38. I don't think I will.