I loved everything about France both times I went.
Within Paris, my favorite district is definetely Monmartre. If you are planning on traveling here, make sure to get a metro pass, as it is invaluable.
My favorite movie is Amelie. If you have seen this, visiting the places within Paris that are seen in the movie is quite easy. I actually had creme brulee at the cafe she works at. It was great.
One of my favorite places in France is a little beach town called La Ciotat on the Southern coast. It is incredibly beautiful and a wonderful place to lounge around on the beach and go out on a boat. The water is amazingly clear, so snokeling is lots of fun.