I have severe insomina and therefore tend only to get a few hours a night anyhow, might I say, short term the 20 hour waking day is excellent a real life saver for the modern worker. Long term, that stuff screws with your mind.

If I had no need for sleep and felt none of the wacky crazy side effects of insomina or the aches of not properly resting my muscles I would probably never, ever sleep even for recreational purposes. I've so much I want/need to do and if I could do it all I would. Part of the reason for my insomina is all down to self infliction, if I have to choose between say, sleeping prior to going work and watching the last 26 episodes of Red Versus Blue on youtube, I have, and would choose watching the episodes of Red Versus Blue every time.