> for everything in between, it's a matter of taste, which is why Netflix tries to infer your tastes and predict a star rating for _you_ rather than gives you an aggregate rating.
This works only to an extent. There are many movie qualities that can be very important to you that you can't represent with a 5 star rating system. Because of this, the main way Netflix clusters your preferences is by the things they know, like genre, actors, producers/directors, etc., and they assume your high rating is (in part) for these things.
This problem is much more prevalent in music suggestions (Pandora, Spotify, etc.) where your preferences are determined almost entirely by genre and artist.
The problem is even more prevalent in ratings for restaurants. If you give 5 stars to an excellent Mexican restaurant, Yelp and Google Maps will suggest to you other Mexican restaurants.
So as a savvy user, you are in a strange position of having to realize how they are clustering things, and give 5 stars to things you don't really like, because you want to be given recommendations for high-rated things in those genres.
And you can't give 1 star to a movie in a genre that you like, otherwise the system will think you hate that genre.
So I would agree with the previous comment, that the "star rating" system is totally broken.