I don't believe in the long novel. It's a subjective opinion, I know, but it's the truth and there's no use denying it. At this point in my life as a writer, I don't have anything worth saying that can't be said to good effect in two hundred pages or less.
Of course, I don't really think about page count when I'm writing. When the needs of the story are fulfilled then the work is done. There's nothing I hate more than reading a great book and hitting a flat spot, usually fifty to a hundred pages long, that just kills the momentum of the novel. It happens so often that I don't even bother to slog through them anymore. I just pinch a cluster of pages (usually about fifty) between my thumb and forefinger and turn them in one go. Then I repeat as necessary.
This isn't to say that I'm incapable or unwilling to read a great big doorstop of a book. In fact, the last two books I read were 800+ and 1000+ pages , and I enjoyed every word of each of them. But these were exceptions for me, and I believe by and large that most writers think they have much more to say than they actually do, and their novels often suffer for it. I would love to hear others' opinions on this, so please feel free to post a comment.