For some reason I tend to work much better at night and feel far more comfortable doing so than during the day. I dunno why, just the way I am. I also tend to be awake during the night and more concentrated than I am during the day.
It is easier to do something at night for me also... For some reason when it's late out and i'm in a hotel room I have a sudden urge to dip down the hall at 50 MPH... Only at night, though... Weird....