Well, Alien and Aliens are two of my all-time favorite movies (though I'm not heavily into the lore), and I loved Prometheus. Honestly I think most of the criticisms of the movie amount to little more than nitpicks. I can't verify this but I wouldn't be surprised if the same people who hated this also hated Signs for not having a meticulous plot, or for letting its themes drive it rather than its plot. It's an open ended movie that made me think a lot and I like that. It's also beautifully filmed and especially impressive in imax 3d. I'd recommend it.