 Typically cartoonists are expected to produce sufficient strips to cover any period they may wish to take off.Watterson's lengthy sabbaticals received some mild criticism from his fellow cartoonists including Greg Evans ("Luann"), and Charles Schulz ("Peanuts"), one of Watterson's major artistic influences, even called it a "puzzle".Some cartoonists resented the idea that Watterson worked harder than others, while others supported it.