When I was a bit younger, I remember being able to get 10 to 12 hours of sleep --oh to be young again.. LOL.
But now, it's 7 to 8 hours.. I do find that getting ~9 hours of sleep is where I perform best. --It's seldom that I get to do this but when I do I feel great.
I noticed that most NBB forumers (is that still a word)? have been getting 3 to 4 hours / night --do you feel tired during the day? or are you fine with it?