I've seen every film by this French master who died way too young. (It will have been 30 years next year since his passing. That is more time than he had to direct his films.) Actually, there is only one of his works I have yet to watch - "Such a Gorgeous Kid Like Me," which seems to have disappeared off the face of the earth.
I'm a big Truffaut fan and he is probably the only foreign language director who'swork I rewlly know. I like the majority of his movies (I've not seen any of his shorts) although Fay For Night and Jules And Jim are my favorites.
I'd actually not seen anythi he directed until I saw CE3K as a kid. That film opened up the door for me becoming interested in all aspects of film more than any other.
Speaking of music in Truffaut films, I just got back from seeing Noah Baumbach's FRANCES HA (cowritten by him and star Greta Gerwig) and most of the score is taken from Truffaut films - lots of Delerue, and also some Constantin and Duhamel. The two cues from Truffaut's SUCH A GORGEOUS LIKE ME have me really wanting to see that now. Too bad it's not easily available.
FRANCES HA is really delightful, by the way. Filmed in beautiful b&w, it is, as one critic said, a mix of a New York indie film and a throwback to the French nouvelle vague. Gerwig is great as an "adorkable" young woman in her late 20s trying to get her act together. The previous sentence makes it sound tiresome and cute. It's not. It's very wise and funny.