Just watched Juno. It's really good if your ok with a certain amount of profanity and coarse joking. (it fits the character) It is so stinking real. I don't mean the pregnancy, I won't presume to be an expert on that, although the baby was shown as rather bloody right after being delivered. I mean the circumstances, the feelings, and all the rest. Specifically the challenge of dealing with a teenage pregnancy in a normal kind of way, one that isn't over dramatized, (you won't see this one on the Hallmark channel anytime soon) and in fact is very funny.
As for the spiritual angel. I simply like identifying with real people in real life. Jesus lived a real life with real laughter and real problems. The film Juno animates life... warts, laughter and all. Additionally, it represents a pro-life view, without being an infomercial.