Jackie Brown and Kill Bill are definite favorites. Pulp, Django and Death Proof I could switch around depending on mood. Inglorious Basterds I like less every time I watch it (though still good), and Reservoir Dogs does not hold up at all.
Just bought Luftrausers from the Steam sale. Took a minute to get a hang of the controls, but it's very cool. Love the music. And I really need to check out FRACT. I'm not a hugely into puzzle games, but everything around them just seems right up my alley.