It takes a lot for me to buy a book that is less than 250 pages. I love 400+ page books. Fiction, non-fiction, it doesn't matter. The way I figure I get twice the value from a $10 500-page book than from a $10 250-page book. That doesn't always hold if I like the book enough, but it is a heavy consideration. If I'm on the fence whether to buy it or not, long books tip it over to buying them.
How about you?