I Married a Witch (1942)

I Married a Witch is a delightfully fun film by René Clair that he made in Hollywood with Fredric March, Veronica Lake, and Cecil Kellaway in the main roles. It's wickedly, laugh-out-loud funny with a whimsical score, and a great script. I had a great time. I also think this would make an amazing musical. Someone should write this!

Gates of Paris (1958)

Porte des Lilas (Gates of Paris) – which was released in France in 1957 and the U.S. in 1958 – was great.
But there is a sequence at about the 20-minute mark that is just luminous. It's an incredibly clever and beautiful section of film. Porte des Lilas is worth watching just for this sequence of storytelling. It's perfect.