Can't limit it to one, I'm sorry.
Kieslowski: Trois Coleurs Bleu
Casablanca
Cohen Brothers: Hudsucker Proxy
The Ghost and Mrs Muir
Sabrina
Roman Holiday
Charade
Chocolat
Shawshank Redemption
Undercover Blues
Fight Club (sorry left it off before by accident)
Okay, I have Audrey Hepburn and Juliette Binoche issues that I'm dealing with, as for Mrs Muir, Hudscucker, Shawshank, Casablanca and Undercover Blues, just accept that you don't understand me. (esp when I admit to enjoying the Adventures of Ford Fairlane a lot as well but I'd hardly rate it as one of the best films ever)
I'm just an odd fellow.