Apart from maybe sci-fi, the horror genre is the one that has the most loyal and fervent fans. Even when it’s not particularly the best film in the world, fans will still take its side if it provides a little bit of the scares, atmosphere, gore etc. that they know and love. It’s also a genre filled with more films than just about any other, simply because they can be made on an extremely low budget (just look at Paranormal Activity’s $15,000!).