While I much rather prefer watching a movie to reading a book, I do appreciate books, and, in some cases, do realize that the books are way better than movie adaptations. Like David mentioned earlier, Jurassic Park. I never read The Lost World, but I read Jurassic Park in 8th grade. There were things which could be explained in the book through text which, if included in the movie, would be boring and unnecessary. But in the book, they are highly interesting, and really add to everything. Am I saying the movie is bad? No, the movie is great.
Another example, my favorite novel of all time, 2001: A Space Odyssey. The book was written a few years before Stanley Kubrick, my favorite director, made the movie adaptation. The book is my favorite because things could be described more accurately through text than movies could. I know the movie was made in 1971? Or was it 1969? Either way, the effects at the time were great in the "beyond the infinite" portion, but in the book, things are described so vividly and so well, you can imagine everything Dave Bowman is seeing. Also, the beginning part of the novel, with Moon-Watcher and the other apes, is described much better in the novel. Even if the film were to be remade today, I guarantee you the novel would still hold up better than any amount of 3D CGI effects you can see.
I also argue that Inception would make a better novel than it would a film, partially because of what I said about Jurassic Park. In the movie, we got a few descriptions of things like the infinite paradox stairs and other general ideas about dreams. Those were so interesting. In a novel, the author would have much more freedom to explain more of these, which, in my opinion, would make even these "filler" parts absolutely fascinating. Also, it would help to develop some characters, which the movie absolutely failed to do.
Go read Wizard of Oz, it is SO MUCH DIFFERENT from the movie, and though it's considered a masterpiece and revolutionized color and set design in films, the book is much better. Unless you sync up Dark Side of the Moon to the movie, then it becomes AMAZING.
OK, I'm done ranting now. Anyone who read this, thanks.