My memory of the film is not so negative, but then:
I was a sucker for 90s action, especially with a hip-hop angle.
It's been three decades since I've seen it (but been listening to the soundtrack pretty much ever since).
My favourite mid-90s US heist movie soundtrack was Dead Presidents, a film that didn't get a sequel but whose soundtrack album was so successful it did!
Admittedly not original compositions, more a "greatest soul hits of the 70s" compilation.
My local symphony regularly screens movies while playing all of the score, and I would LOVE if they would do Conan. Sadly, I think it's unlikely, but I can dream! As far as I'm concerned, it is the Platonic ideal of an epic fantasy score.
When it comes to Blaxploitation soundtracks, Isaac Hayes's Shaft title track get all the attention, but it's basically just Ike reading out the elevator pitch for the film over a riff (admittedly, one of the greatest riffs of all time), and the rest of the soundtrack doesn't hold up nearly as well.
But Super Fly is a whole album's worth of delving into and exposing the underbelly of life in the big city. A concept album with moving lyrics, great melodies and driving rhythms throughout.
I can't answer what my favorite is per se, but two of the most memorable scores I can think of are for Swiss Army Man and Ravenous.
I believe Daniels tapped the band Manchester Orchestra to do the music for Swiss Army Man. For whatever reason, they chose to have Paul Dano and Daniel Radcliffe sing on the soundtrack and the lyrics are usually just narrating what is happening on screen. case in point. It's a lot of fun.
Equally avant-garde, but substantially more "challenging", shall we say, the score for Ravenous is very striking and idiosyncratic, as befitting the film it's accompanying. Also written by a popular musician, in part at any rate. Michael Nyman, the second composer, said Damon Albarn (of Blur and, later, The Gorillaz) wrote about 60% of the tracks and he composed the remainder. Several of the tracks were performed by people who had never played their assigned instruments before in their lives, to create a deliberately off-putting soundscape. Others are traditional period marching songs befitting the frontier America setting. Some are based around electronic loops and samples. And others are very traditional, pleasant (if ominous) orchestra pieces. It's really a wild listen. Check it out for yourself.
Man, I literally wound up listening to that entire playlist last night after I posted the comment. I've only seen the film once, probably a decade or more in the past at this point, so I really only had the overall impression of the score in my head. It's even better than I remember it.
Also, I put together that Nyman also composed the score to Gattaca, which is another very stirring soundtrack. I can hear elements it in the more traditional portions of Ravenous.
Paris, Texas. Pure desolate vastness, pain and longing and loneliness. The whole soundtrack is out of this world. Absolute pitch-perfect genius by Ry Cooder setting the tone for what is also a phenomenal film in its own right.
Not my favorite because I don't really pick favorites but I remember that forgettable vampire movie, the one with Aaliyah, had a pretty good soundtrack. If you like early 2000s rock.