When my creativity fires up, it usually does so at 4am or thereabouts. Mom says that the formula for creativity is inspiration (stimulating one's mind with materials) followed by processing (not being stimulated, which allows the previous stimulation to process and spawn a bunny.) Since I am a net addict who sits in front of the computer being stimulated all day, the only time I'm not being stimulated is when I go to bed, so that's when the bunnies bite. Lack of creativity can be attributable to either lack of stimulation or lack of time spent unstimulated.