It seems that scientists are on the trail of a genetic mutation that makes a person require less sleep. A major sleep study came up with two women who just naturally need only about six hours a night. The authors were quick to point out that, unlike millions of other people, these two are actually fully rested after the shorter night's sleep. I wish, wish, wish I had this gene.
Think what a jump you would have on the rest of the world if you only needed four or six hours and then woke up fully rested. You could work, read, exercise, socialize, or do any number of other things, and still be bright-eyed when it was time for the rest of the world to wake up. Now that would be a mutation to be proud of.