I tend to be pretty amusing when I'm sleep-deprived, by most accounts ;) Certainly I tend less towards "I'M GRUMPY AND HATE EVERYTHING" (at least when I'm getting strung out for data) and more towards "THAT WASTE PAPER BASKET IS THE MOST FASCINATING THING IN THE WORLD, WOW, WHO THOUGHT BINS WERE A GOOD IDEA, THEY WERE BRILLIANT" [actual example from the last 36 hours], so!