I am a night owl. I like to go to bed very late. I am rarely awake early in the morning.
Do you have a sleep disorder, or is this just a choice?
I do suffer mild insomnia but much prefer to stay awake late. Night owls get their name from the nocturnal habits of owls.
Most owls are nocturnal, but some are considered crepuscular. Such as the pygmy owl.
night owls may stay awake until just before or even after dawn. Night owls tend to feel most energetic just before they go to sleep at night. 
Some night owls have a preference or habit for staying up late, or stay up to work the night shift. Night owls who work the day shift often have difficulties adapting to standard daytime working hours.
Night owls have often been blamed for unpunctuality or attitude problems. Employers, however, have begun to learn to increase productivity by respecting body clocks through flexible working
the night table and put it in the suitcase that is at the foot of your bed." Three days later, having put her back to sleep, I say to her: "Do you remember what I ordered you to do?" She answers: "Yes, I must put the glass in my suitcase Thursday morning, at eight o'clock."—"Have you thought about it since I told you?"—"No"—"Think hard."—"I thought about it the following morning at eleven o'clock."—"Were you awake or asleep?"—"I was in a drowsy state