I rarely (pretty much never) listen to commentaries, I can only recall 3, The Wicker man, the worm eaters, and 2010 After the fall of new york (recalled AC version), the latter two because my friends did them.
I also rarely watch extras on DVDs, I prefer DVDs over video, because I get a better picture, hopefully OAR and uncut.
I love films, have less interest in them being talked about, except with friends (or enemies), where there can be dialogue both ways. Same as I don't read reviews until after I have seen the movie.