Every artist learns through imitation, but I rather doubt the aim of these things is artistic development. I assume they're either homages or satiric riffs, and are not intended to be taken too seriously as works in their own right. Otherwise I should be talking to a copyright lawyer.
Bill WattersonI enjoy the drawing more than the writing, so I try to think of ideas that will allow me to develop the visual side of the strip as fully as possible.
Bill Watterson