Netflix recommends I watch Wings of Desire (1987), and predicts that I will give it 3.9 stars, based on my feelings for Nosferatu the Vampyre (with Bruno Ganz), Downfall (a great movie also starring Bruno Ganz) and Big(!). The problem is I've already seen it. I rented it from Netflix in 2006 and rated it 3 stars. I guess it went out of print and then a new edition was made, but the rating I gave it in 2006 didn't transfer from that edition to this. I don't remember exactly why I gave it a lower rating. Should I re-rate it 3 stars, in total disagreement with what Netflix knows about me? Or trust Netflix? I feel bad for disagreeing with the Netflix prediction of my rating, because they spent a million dollars to improve their recommendations.
Two things of note: I love Bruno Ganz, as an actor, and I rate every movie I've seen on Netflix.com.