I gave it a 4/5. I enjoyed it, but I understand why others would find it dull. In fact, some of the religious background, which would be terribly boring for many, was fascinating to me because I could fit it into my knowledge of Christian history. But my tastes are esoteric like that.
The funny thing is that I watched it at the strong recommendation of my mother who loved this film so much that she forced my father and brother-- who don't appreciate a film without at least three explosions-- to watch it. They now have it marked as the most boring film of all time. I could try to get them to watch a couple other films that they would mark as a new low, but I don't want to torture my family meSmbers. Too much.
I don't really even consider BF a divisive film. Some would appreciate it, others wouldn't. But I think few would claim this film as great or as one of the worst they've seen.