I just re-watched M. Night Shyamalan's "Signs". It was like the third time I've seen it, but hadn't watched it in a long time. So well done. I always wondered how many people thought this was a movie about an alien invasion, a new take on War of the Worlds. In truth, in my opinion, it was a movie about faith. And, implicitly, about family. As good authors and playwrights have done since ancient times, Night used the paranormal or supernatural or, in this case, sci fi, as a backdrop against which to tell a very human story, one about two of the most core human values: faith and family. Notice that essentially the entire film took place in that house and the only real players were the family members. Values, priorities, a reminder of what really matters.
An aside: I heard some time ago a comment from Night that he intends to return to his original genre or style of storytelling/filmmaking. Apparently the lack or artistic and commercial success of his last film seems to have kind of reminded him of what he does best. I did like "The Village", though, very much.
M, what is secretly responsible for all the crop circles