The guy produced trashy television and he knew it! But he had a pulse on what the public WANTED during almost every decade - from fantasy/jiggle TV in the 70s to over-the-top greed in the 80s to teen/yuppie soaps in the 90s. True, they weren't art, but no one can question that his productions were entertaining.
The only thing he produced that wasn't entertaining was probably (say it with me...):
Tori! Thanks for the decades of mindless fun, Mr. Spelling. You will be missed.