Night owl who works for herself and keeps a very irregular schedule. My bedtimes vary greatly from day to day (husband is the same way).
I apparently have Delayed sleep phase syndrome (DSPS). As it says in Wikipedia, DSPS causes a much later than normal timing of sleep onset and offset and a period of peak alertness in the middle of the night.
_________________
?How I wish that somewhere there existed an island for those who are wise and of good will.?--Albert Einstein
INTJ.