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.
Yep, Many when it comes to animals researchers typically use the terms "morningness" and "eveningness" for the two chronotypes or diurnality and nocturnality in animal behavior