I guess if you are used to Star Trek next generation and people acting like adults its harder to wacth Prometheus.
Well, Star Trek is probably the most logically-consistent future-setting sci-fi franchise there is. In terms of the characters acting like adults in a sci-fi franchise, Star Trek is the top of the line. You aren't going to get any better than that without going into a different genre.
Also I hate religion so that left a foul stench in the room for me. It took a lot of stuff from alien as well. i guess if your not christian or were not raised christian youd miss all the jesus inuendo.
It is a prequel to "Alien", and it's directed by the same guy (Ridley Scott), so it is expected that it would take a lot of stuff from it.
In terms of religion, I can't say that I have a problem with Prometheus making references to it. In fact, I'm somewhat glad it did, as I have not seen any sci-fi franchises address the issue much at all in their respective settings. I've always wondered why fictional depictions of the future never address where religion stands in them, even though over 70% of the world today, believes in one. I guess there's no way to do it without offending people. In Prometheus, (aside from having the main character be a Christian) it was portrayed as something that some people choose to believe in, which is more or less how its always been. That being said, all that Jesus innuendo revolved only around the main character, and it had nothing to do with anything besides establishing her character. If you hate religion, it can go a long way to enjoying the movie by not personalizing a fictional character's choice for having one.