most days 8-9 hours. 5-7 during stressful times and on occasion 10 when "catching up" on sleep.

I prioritize sleep as I think thats the single best way to live a long life and to have a healthy brain. After all, for most us, its our livelihood and I'm hoping I can avoid serious neurological diseases and disorders just by getting a full night's rest as often as possible.

http://www.npr.org/sections/health-shots/2013/10/18/23621181...