Ridley has made a personal plea for our species here

Rating: 8/10 (10 June 2012)

Mr Scott is the only filmmaker I'd ever want to sit down with and enjoy a long conversation, I think. The vision displayed in Blade Runner and Aliens is as sharp and deep as it gets. I wish I could conjure up such landscapes but I'm glad someone can. Prometheus is not in the same category as those other films. It's more an addendum to both.
I enjoyed watching it, Ridley is too good at what he does to not make an enjoyable film, but it's rather clumsy in its basic thrust. That's mostly to do with the screenplay which doesn't seem to direct the action in an optimal way given what the movie is really about. There should have been far more made of Weyland's quest to know his maker, for example. (He's the dead billionaire who finances the deep space expedition.) And there are problems with motives for some of the other major characters as well.
Unlike many of the other reviewers, I think Fassbender, who I think is pretty much single-handedly rewriting acting standards, is not the natural focus of the film. Instead it falls on Noomi Rapace who as Dr Shaw makes me a bit uncomfortable. She's a little too odd to play the hero, or even take the lion's share of the screen time, in my opinion. I also didn't think Theron's role was well-advised. It's a little too inexplicable and cold for my taste though I generally eat up everything Charlize does.
In the end I was left a little dissatisfied though I had plenty to think about. And that's worth quite a bit more than the price of a ticket.