Sleep is an odd thing to enjoy isn't it? But I do enjoy it for some odd reason, yet hated it as a kid. You dream odd things that you'll immediately forget, a bunch of time passes by...its just odd.
I read a book with various paranormal stuff in it once. One of which included a story, alleged true story, about a russian guy who was hit in the head with a bullet during WW2. Or maybe it was a German guy hit with a russian bullet? Anyway, he was in a coma for quite some time. When he came to, he never slept again. He worked 2 jobs both day/night and developed a typical schedule like anyone else except that he never slept.
Now how true that story is, I'll never know but if so, it's very interesting indeed. There was also, allegedly, some experiments in Russia where they used a gas of sorts to keep people awake, they went crazy and basically turned into zombies even to the point of eating themselves?
Just one of those crazy things you read on the interwebz.