depends on your definition of "good." john mctiernan films on which he does commentary are quite informative about the process both technically and creatively. so are ridley and tony scott's or william friedkin's films where you can find commentary. any film in which val kilmer appears in which they allow him to be part of the commentary is a keeper, he's f***ing hilarious. i know, i woulda never believed it either, but his commentary sometimes rivals the film.
in general i prefer it when the film makers or whoever is doing commentary realizes that anyone who's watching the commentary has seen the film at least once or twice and is listening to the commentary not necessarily to get a shot by shot explanation of the film. kevins smith's films have great commentary.
i always love it when they cobble together the commentary to allow several people who did not record their commentaries together to appear on the same track. a hilarious example of this was "resident evil: apocoplyse" where milla jovovich and oded fehr recorded commentary together which was spliced with sienna guillory. milla and oded are bawdy and funny and pay only passing attention to the film while sienna's bits are deadly serious and earnest. the juxtaposition of them makes for hilarity.
i think that commentary is hit or miss and depends on what you're looking for. on "clear and present danger" they chose to put tom clancy in a booth with the director and the author proceeds to pretty much rip the film to shreds along with nearly every idea the director poses which i found priceless.
r.i.p. marco, my guardian angel.
...global warming can manifest itself as heat, cool, precipitation, storms, drought, wind, or any other phenomenon, much like a shapeshifter. -- jim geraghty
pray to st. jude
i'm a sonic reducer
he was the gimmicky sort
fenchurch=mejusthavingfun=magwildwood=mmousefan=bkcollector=bradmajors=somethingtotalkabout: the fenchurch mpd collective