A bit of an offshoot from my last couple of posts,
It is what I call the First Form Imperative.
That is that the value of any text declines as it changes form.
My examples would be;
Hitchhikers Guide to the Galaxy was at its best as a radio serial, the books were still fantastic but the TV series and the film did nothing to add to the franchise. Of course the passage of time might interfere with this as the Film has better technology than the TV series.
Likewise Lord of the Rings was a better book than Film while Star Wars is better as a film than any of the books (or graphic novels).
Any comic book is completely crap when it gets to the big screen (Judge Dread, Hellboy and everything Marvel or DC) but the Batman TV series was better than the films.
The same is true with the new trend to turn games into movies or books.
The one place where this rule might not work would be Fantastic Voyage, where Isaac Asimov wrote the book of the film and decided he didn't like the Hollywood ending so he changed it. Although, despite the film being made first, the book was released first (and I never saw the TV series, but I'm going to guess it was appalling) so perhaps the imperative still applies?
Anyone else think they have an exception to John's First Form Imperative?