Introverts of the world unite! Seriously, night time is great because having large chunks of unstructured time is good for creativity. There's no one to interrupt you or be offended by your (unpredictable) results.

My waking hours are typically 12pm-3am. Can confirm that eating during the early morning (i.e. when normally asleep) puts a noticeable strain on the system. Which must be connected to the scientific fact that night shifts are bad for health. I presume partly because night shift people don't do night shifts all the time and thus have to continually reset their circadian clocks, which will include eating at the 'wrong' times.