Lovefilm is a very popular website similar to Netflix that allows people to rent or buy films and series to watch on different devices. You can also find out what are peoples favorite films/series by being able to sort them by 'popularity'. On Lovefilm.com they have listed a set of films ordered by popularity, the top 5 rented films are Frozen, Maleficent, Guardians of the Galaxy, The Inbetweeners 2, Mr. Peabody & Sherman.
Currently Lovefilm.com shows that the most popular rented horror films are The Conjuring, Oculus, World War Z, Finders Keepers and Ghost Busters etc. The top 10 films seems to be flooded with either paranormal or physiological horror films, this tells us that more people are renting these kind of films, leaving a gap in the market for other horror genres such as slasher or zombies etc.