I personally like reading shorter novels. I am sure a lot of people do too. My ideal is 300 pages in finished books form. I would go to 350 if I have more of a story.

On the genre. Frankly, the book stores I have seen seem to rank a genre by 3 descriptions. For example, a YA novel about robbing a bank in the 1930's might be YA, Nostalgic, and Adventure. My problem with Genres is that there is a lot of straddling.