Ask HN: For normal sleepers, what is your sleep experience?

Three years ago I started waking up in the middle of the night and struggled to go back to sleep. Thus began my journey to improve my sleep. Unfortunately it was a downward spiral for the first year and a half. It was around that time I went through cognitive behavioral therapy. I believe it has helped me the most. But whenever I suffer a poor night of sleep it is still difficult to fend off the negative thoughts. Because of my sleep troubles I believe I've lost touch with what normal sleep is. That I continue to have unreasonable expectations of sleep.

Therefore I thought it beneficial for me, and others, to hear what sleep is like from those who do not consider themselves to have sleep issues. How many hours a night do you sleep? How often do you wake up? How consistent is your sleep? How often do you have a poor night of sleep? What do you consider a poor night of sleep? How has sleep changed as you have aged? How has it changed during seasons in your life?