Commentary Tracks

So as I mentioned a few weeks ago, I've been doing some DVD reviews for a website, in exchange for free DVDs.

It's sort of an experiment on my part. I've found that my movie-watching is down a lot, and I wanted to be forced to watch a wide swath of movies, the good stuff along with the bad.

A wide swath it is indeed.

One thing I'm amused by are commentary tracks. I watched a few decidedly-mediocre films in the past week, in which the director does a commentary track, and just once I'd like them to talk about why their vision didn't result in a film that actually works. Of course, they never do; most of them just spend their time praising the actors and the crew. Few of them offer anything that is intructive to any aspiring writers or directors.

So I want to know where the bar is. What's your favorite commentary track? The most entertaining? The most informative? The most honest?

Let me know where the bar should be set, because none of the ones I've listened to recently set the bar very high (and though I have a ton of DVDs of movies I like, many with commentaries, most of them I've never found the time to listen to).