Thrillers are defined by their use of suspense, tension, and excitement. They include many subgenres like mystery, crime, and psychological thrillers. Common conventions include settings that create an atmosphere of menace and violence, with society portrayed as dark and dangerous. Successful thrillers employ narrative techniques like plot twists, misdirections, and cliffhangers to thrill audiences. Famous thriller directors include Alfred Hitchcock, Brian De Palma, and David Fincher, while classic thriller films mentioned include Psycho, The Silence of the Lambs, and Fight Club.