Spaceballs (with possibly the WORST commentary ever recorded) for all that... .
I agree. I was sitting there watching it on commentary one day, I was excited for it actually, and I'm waiting to hear all these inside jokes or cool anecdotes.
And really the whole thing was Mel Brooks saying the lines as they were happening, laughing at the jokes in the movie, or just being silent. Every once in a while he might say who was involved in the film, but that's about it.