Are you a night owl?  do you tend to stay up until late at night?
Yes, I really am a night owl.  I usually stay up too late and am tired the next day.
Me too..I just can't go to sleep early it seems.  The opposite of a night owl is a early bird.  someone who wakes early and goes to bed early. 
I would not consider myself an early bird, besides the weekdays when I have to get up early to go to work.  I am not disciplined in going to bed early.
In many different countries especially Scandinavia early birds are called "A people" and night owls are called "B people"
That's interesting.  The night owls jargon was derived from owls because they are nocturnal.
right, exactly.  Usually people who are night owls stay awake past midnight and extreme night owls may stay awake until just before or after dawn
That's exactly correct.  Night owls normally are successful in jobs that do not include getting up early.