You know what I love most about Bill Watterson, even more than his absolute genius at comics and amazing insight? The fact that he was never interested on making a bajillion dollars through merchandising. He was regularly offered to have companies make everything from plush Hobbes toys to Saturday morning cartoons and he turned them all down. He could have been as rich as Jim Davis (net worth $5.8 billion) but he cared about Calvin and Hobbes too much. And then, one day, he decided he didn't want to do it anymore before it got stale. So he quit.
So much respect for that guy.
Incidentally, a book just came out that he did the illustrations for. I haven't read it myself.