Django Unchained and Inglorious are the only films I've liked of his and Djanogo was brilliant. \My vote goes for Django
I think its the QT film that rewards rewatches the most. Its his most thematically complex and structurally ambitious movie. And all the needle drops are just great. The David Bowie cover of "Cat People" that starts the final chapter is perfect.
Reservoir Dogs is my favorite, but I love them all. Even Death Proof.
Best: Pulp Fiction
Favorite: Inglourious Basterds
Pulp is a flawless masterpiece that has become an iconic piece of pop culture for damn good reason.
Basterds is his other masterpiece, but hasn't achieved that same level of cultural osmosis. I love absolutely everything about the film. All the moments of tension, drama, comedy and sadness all land with tremendous effect.