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 WattersonCalvin is hammering nails into coffee table. Mom: CALVIN WHAT ARE YOU DOING TO THE COFFEE TABLE?!? Calvin: Is this some sort of trick question, or what?
Bill WattersonThe more words you have at your disposal, the more precisely you can express yourself.
Bill WattersonToo often cartoonists just look at other cartoonists and, after a lot of inbreeding, everyone has the same funny look. The challenge of drawing is that there is no one right way to visually describe something. It's a good thing to confront your limitations and preconceptions every so often.
Bill Watterson