7 hours seems to be the magic number for me... any more and i'm groggy the entire day and any less and i'm irritable for at least 1/2 the day.
I would love it if someone would invent a pill that somehow concentrates your sleep cycles so that you can get the equivilant of 8 hours in 20 or 30 minutes. I'd make it myself and become a millionaire, but I'm no scientist... so I leave the idea to the rest of you.
