It's a given that any filmmaker or actor is a movie fan on some level, but like the Quentin Tarantinos of the movie world, Wright, Pegg, and Frost share a truly monumental love of cinema, especially genre flicks. That enthusiasm crops up throughout the trilogy in ways both big and small.
Sometimes, it's a matter of direct mentions, such as Hot Fuzz explicitly name-dropping Point Break and Bad Boys II - two films that heavily impact Fuzz's plot - while The World's End borrows Peter Fonda's climactic speech from The Wild Angels not once, but twice. Other nods can be a bit more subtle; Shaun works at Foree Electric (as in horror icon Ken Foree, the hero in Dawn of the Dead), and he tries to get a reservation at an Italian restaurant called Fulci's (as in Lucio Fulci, gore film legend and director of Zombi 2.
Each Cornetto movie also tackles its own genre, mixing comedy with zombie horror, buddy cop action, and alien takeovers. No doubt about it, these movies know their genre history and embrace it with gusto.