8 hours sleep seems like bliss to me. Even if I actually get to bed giving me enough time to have 8 hours sleep, I usually have trouble drifting off and then when I do, I'll wake a few hours later, and repeat.

I find that there is so much stimulation throughout the day, so many things I want to read about, experiment with and work related problems to solve, I really struggle to switch off at the end of the day. I try to console myself with this - http://www.wsj.com/articles/sleep-experts-close-in-on-the-op... 7 hours is better than 8 :-)