[pawelduda]

If I sleep for 8+ hours, I feel foggy and get a characteristic minor headache that lasts for hours. Basically guaranteed if I go above 9-10. Seems I function best at 7 hours so I wonder what's up with that headache

[qup]

If I sleep 6 or fewer hours, I feel queasy for about half the day.

My body prefers about 9.