I really love being a night owl, staying up late is really fun and can really get your mind going,
I know what you mean but lately I have been going into work early. My night owl days are saved for the weekends.
Indeed for me that seems the same, In fact the term night owl is derived from the primarily nocturnal habits of the owl. 
I guess I never really thought about that. I bet there are a lot of people that are night owls.
Researchers traditionally use the terms "morningness" and "eveningness" for the two chronotypes or diurnality and nocturnality in animal behavior. In several countries, especially in Scandinavia, early birds are called "A-people" and night owls are called "B-people".
Etymology.
The term is derived from the primarily nocturnal habits of the owl. Most owls sleep during the day and hunt for food at night.
Characteristics.
Usually, people who are night owls stay awake past midnight, and extreme
"Shūkan Bunshun", "To be honest, I've never really thought about whether my movies were being watched by men or women. We always presume that only guys are going to turn them on... Still, this'll be a great chance for girls to get to know about the porno movie industry. I think the most enjoyable part of the night is going to be the questions asked after the films are over. I wonder what the girls are going to ask me?"
At the 17th Pink Grand Prix