I have a 9-5 job, I get up between 6am and 7am without an alarm, leave around 8am. My bedtime is usually between 10pm and 11pm, often earlier during Winter, but never past 11pm, or I miss "my time" and won't be able to fall asleep for hours.

This is a result of my past sleep problems. I had the same problem as some people described above: tossing and turning, thoughts rushing through my head, aware of passing time, often several hours before falling into a shallow sleep. Well, I started looking for help and was diagnosed with anxiety. It took a couple of years of therapy and sleep training, but now I have to maintain relatively steady sleep schedule which comes natural after a while. I can't go to sleep too late and I can't oversleep, I have to be out of bed by 8am the latest, unless I'm sick.

So my point is if you have such sleep issues that they affect your functioning during the day try to find some medical help. Many health insurance plans cover behavioral health problems (sleep disorders, anxiety, depression, anger, etc.). Sometimes you just need to talk to someone and change your habits a bit, sometimes you need meds or both. But if you can it's worth trying. Having a good night sleep can do wonders to your overall health.