Good DVD Commentaries?

[Bartman387]

I'm looking to having a relaxing/boring stay at home friday night tonight. So I figured what better time than to buy myself a new movie, but one with a great director commentary as well.

While funny one's where the actors are being real entertaining (Arrested Development commentary comes to mind) can be fun, I'm looking for more of a serious commentary.

So what are people's favorite ones? Are the commentaries on the Batman Anthology set any good? I've been thinking of buying them for a while.

Thanks