Best Commentary Track on a Blu-ray

[BenOswald]

I thought of a couple more:

Mike Mills on Beginners & Thumbsucker

Mike Leigh has some interesting commentaries on his movies.

Anton Corbijn - Control

It's been mentioned before in this thread, but Ridley Scott does a good commentary. To me they're interesting because it's often more from the point of view as a producer.

Paul Thomas Anderson - Hard 8 (Sydney)

Jacques Audiard - A Prophet + Rust & Bone

Days of Heaven - the supporting crew's commentary lends some good insight into the production

The Shining - there's one DVD version with Garrett Brown, inventor of the Steadicam, where he talks about Kubrick's use of it and how they influenced each other.