I think the great thing about netflix is that it's recommendations try to predict what you would rate a movie. So, if you consistently use three stars to indic

I think the great thing about netflix is that it's recommendations try to predict what you would rate a movie. So, if you consistently use three stars to indicate "liked it, reasonably good" and I use it to indicate "waste of time" then our respective recommendations from netflix will be different. The movies it predicts as 3 stars for me, will be movies I think are a waste of time, and for you would be movies you might find reasonably enjoyable.