Are they just filler to "make up" extras where Japanese companies are unwilling to part with material, or are they of actual use and of interest? I love me a Clementary, as he's to anime what Bey Logan is to kung fu, always informative, always interesting, and always entertaining. You learn stuff about the show/movie you're watching, and he elevates the disc. Japanese director commentaries can be good too, the Kawajiri commentaries on Cyber City are excellent. I have a soft spot for Japanese cast commentaries, even though they tend to goof around even more than their US equivalents. I think they're contractually bound not to have an opinion, but they can still entertain at times, and stuff like the Bakemonogatari character commentaries are golden. But US commentaries. Once in a rare while you get some good ones, Gilgamesh springs to mind, but for me Funimation's yak tracks are all the same. The same actors saying the same things on each disc, and they record them as a matter of rote, not because an episode is special, not because they have something meaningful to say, they just indulge in some raucous gossip for twenty minutes that means nothing. It's just as vacuous as some of the Japanese cast commentaries (Planetes springs to mind), but it's nowhere near as entertaining. Does anyone actually listen to audio commentaries?