I don't listen to a lot of commentaries, and have never listened to one on the Star Wars DVD's. I only watch commentaries when there seems to be some humor value in it, or if its something that really reveals a lot about the subject. I watch all the commentaries on the Simpsons DVD's. Those guys are funny, and they have a lot to say without whining about limited resources.

The only other commentary I ever watched was, and I highly reccomend this if you are a fan of the books, is the commentary on the Series of Unfortunate Events DVD between the real Lemony Snicket and the director. It is so funny, and was much better than the actual movie, which was a let down. Even if you didn't like the movie, the commentary is simply hilarious.