I use to be! I even got a job working nights because of it... but then... I realized I was nocturnal because I was lazy, not because I was nocturnal.
I moved to a day shift 6 months after working nights because it was taking a huge toll on my body. I now have a normal sleeping pattern cause of the early schedule. I feel so old... I go to bed at 9pm (with the exception of tonight, it's my day off tomorrow) and wake up at 5am! =P I kinda miss the days where I didn't have to work, played WoW all the time - slept at 6-7am woke up at 5-6pm. ^^;