Scroll down to How You Sleep Is Who You Are Early risers prefer to gather knowledge from concrete information. They reach conclusions through logic and analysis. Night owls are more imaginative and open to unconventional ideas, preferring the unknown and favoring intuitive leaps on their way to reaching conclusions. ... Morning people are more likely to be self-controlled and exhibit "upstanding" conduct ... Evening people, by contrast, are "independent" and "nonconforming," and more reluctant to listen to authority http://www.theatlantic.com/doc/200712/primarysources www.peoplewho.org