I'm in the "absolutely loved it" camp.
I'll post more on the individual tracks, as I don't think the arrangement or the situation allows for a general review of the whole score, but my most pleasant surprise was the overall mood.
It's tragic, almost. Dramatic, tense, terrifying, and very very human. That's what nailed it for me, I think. This isn't an Alien3 magnum opus, nor a complete mystery like Alien. The audience knows pretty much whats up at this point. If there's a derelict, and anything to do with the Alien, people are going to die, and horribly.
These tracks, especially the first one, The Planet, convey such a sense of powerful sacrifice, endeavor, and loss. In a film like this with so many powerful characters, you need the focus to be on this sense of mortality and yearning to survive. Each death is another part of the whole, and you can almost feel the entire human race hanging by this ill-fated but wonderful breakthrough mission that is Prometheus and what it means for civilization. Just makes it that much more moving, to me.
I really didn't want some hyper-scary generic horror soundtrack, or a fake epic non-stop choir of pseudo drama and seriousness. The minimalism of the style is so fitting, the timing and everything, really just right for me.
All I could think were David's foreboding words: "how far are you willing to go to find your answers?"
Makes me want to invest myself in the film and the characters, and from a fans point of view, that's about as successful as you can get with a score.
Enough of my shallow snobbery! Back to listening...
