Kill Bill: Vol. 1 is best known, at least by Quentin Tarantino himself, as Tarantino’s first Movie Movie Universe film. To explain. Tarantino has said he makes two types of films: ones belonging in The Realer than Real World Universe, and others in The Movie Movie Universe. The Realer than Real World Universe is for films that are based in a slightly heightened version of reality. This is where Reservoir Dogs, Pulp Fiction and Jackie Brown belong. The Movie Movie Universe is an alternate, fantastical reality. To put it simpler: characters from The Realer than Real World Universe would likely go see a film from The Movie Movie Universe. Which makes sense. I mean, can’t you imagine Ordell Robbie loving the shit out of Kill Bill?
So, in short, Kill Bill: Vol. 1 was a real departure from the QT films that came before. It literally opened the filmmaker up to a whole new world.