I don't know anyone who actually likes the dark or night-time. I don't care how much they say it doesn't bother them. That's why we used to huddle in caves and light fires when the sun went down.
I tried the paleo diet, which is the caveman diet - lots of meat. And I tried the calorie restriction diet: The idea is that if you eat very, very little - if you're on the verge of starvation, you will live a very long time, whether or not you want to, of course.