Depends on what it is, really. Something like the Dark Knight, I love the movie but I'm not interested in the features, because I've seen so much about the making of the film on tv and online since its inception. Indiana Jones, however, now there's some special features I couldn't wait to dig into. All that never-before-scene footage and behind the scenes stuff...
I also enjoy certain commentaries. Not all of them, not the boring ones, but Spinal Tap, for example, the commentary is like watching a whole new movie. The cast does it in character, all improvised, and it's hilarious. I like Conan Obrien's commentary on the Simpons episodes he wrote, as well. "Ah yes, another old person, wasting a young person's valuable time."

I also enjoy certain commentaries. Not all of them, not the boring ones, but Spinal Tap, for example, the commentary is like watching a whole new movie. The cast does it in character, all improvised, and it's hilarious. I like Conan Obrien's commentary on the Simpons episodes he wrote, as well. "Ah yes, another old person, wasting a young person's valuable time."
