while i'm certainly no musical expert, my gut instinct tells me movie music has sorta been watered down in the semi-recent past... and that most audiences don't really have much of an ear and an understanding for the craft of telling story through music
while django unchained had some "cool and hip" tracks, which is typical for a tarantino movie, i don't really think the musical story had much coherence if any. if Morricone says it, it's not something to be ignored.
what i'm getting at is, i think the best movies are scored, usually by a single masterful composer. that composer works closely with the director to deliver a musical story that, united with the visual story, creates a powerful force that is on full display to the audience when the movie is released
but where are the Bernard Herrmanns or Jerry Goldsmiths of our age? kinda seems like it's Hans Zimmer and a bunch of his imitators/pupils... now a lot of people love that style music, the loud persistent banging of "Inception" that has been imitated many times since... i guess a lot of people just don't care or pay it much mind.. i do think Moon (2009) was a well-scored movie, by Clint Mansell, however
to bring it back on topic to Tarantino, i don't think he's ever collaborated with a single composer to create a distinct moving force of music to lay over his film. it's an all-over-the-board mishmash of pop culture music. and many seem to love that, nothing technically wrong with that i suppose...
yet i think it is possible this could be a limitation in his skill as a filmmaker and storyteller. think about some of the most iconic scores... Psycho (1960) by Bernard Herrmann, Chinatown (1974) by Jerry Goldsmith, Taxi Driver (1976) by Bernard Herrmann (again), even Morricone's scores for Leone's (Tarantino's idol) movies... such as For a Few Dollars More (1965) and the Good the Bad & the Ugly (1966).. and so many more
even a guy like John Carpenter showed guts and talent, to score some of his own movies... like the score for Halloween (1978). it's become part of the culture of that holiday thanks to his movie. what if Carpenter had gone a different route and just recycled old themes he liked from movies he's watched instead of creating his own? music that's become part of the musical culture of stories would never have come about
how about the scores by Goblin for Dario Argento's Italian horror films? Those are great!
i'd love to hear more atmospheric scores like that. instead we often get the incessant banging of Zimmer and his imitators, or a lot of recycled pop culture related stuff.
i end by saying this was probly just all a bunch of useless rambling, but what if there's something to it dammit?!