Gryffindor: Anything gripping and Nonsense; at least it shouldn’t get boring. Gryffindors are only enthusiastic about books with a fluent story; otherwise they’d stop reading in the middle of the book. About the half of the Gryffindors actually read a lot of books; the others aren’t really passionate about reading.
Slytherin: Nonsense and Horror. Just like the Gryffindors, they hate stories that flatten down in the middle. Slytherins usually read a lot and share their muggle books (after the war against Voldemort, they got more tolerable with muggles and mudbloods), so they’re all reading the same books and nobody’s alone in their fandom.
Ravenclaw: The most of the Ravenclaws are fond of either dramas and non-fiction or real stories. They don’t really like made-up, surreal stories and fiction, except old tales and myths; they also read and write a lot of poems. Only a few purebloods read muggle books because the Ravenclaws usually like to buy the books themselves.
Hufflepuff: They’re having a soft spot for Comedy and schmaltzy Romance. The Ravenclaws find it pretty tasteless of the Hufflepuffs for liking kitschy books, but they actually just read them for fun. Hufflepuffs never really take novels they read in their spare time serious; that’s why they avoid creepy or serious texts. They basically read for amusement.