How many hours do you sleep at night

Same here, I can always tell when I don't get a full 8 hours (even if I sleep for 7 or even 7.5 hours I can still feel that I didn't get a full 8)

That is early , I remember that when I was in High School I knew some people who didn't wake up until Noon or later on Weekends (although they typically stayed out until at least 3 or 4 in the morning).

Although later on in High School I had to wake up around 4:30 AM to go to work on some Saturdays (but it was a real good job so I didn't mind it much).

Circadian Rhythm Disorder...I saw a specialist about it but that's not my only bug sooo...I unfortunately ignored the situation and further appointments.

For years I slept 3/5 hrs a day mostly[broken sleep] with scattered dips to 2hrs and maxing at 10 or 12. [rare] Depended on mood swings.

Since I stopped smoking last summer my sleep has improved to a noticeable degree. Still Circadian cursed but getting a fairly consistent 6hrs with peaks and valleys not so dramatic as before. I chug along well on six...and don't wake as often either. Mood problems can still trump the improvement at times but overall I'm ahead.

At night: from about 10:00 - 7:00. 9 hours
During the day: usually 5 or 6 naps, some of which are actually voluntary.
Narcolepsy sucks.

8-10 hours every night, starting at 9.30-11.30pm.
Will occasionally nap during the day.