If you are new to Netflix, and need help filling your queue, start by looking at their award-winning movies lists. If you have seen any of those movies, rate them. Rate all the movies you have ever seen. Keep in mind that, for movies you rate a 3 or above, Netflix will recommend more that are similar to those.
If the recommendations don't work, Wikipedia, the free online encyclopedia has a couple of interesting lists you might find inspirational:
List of movies that have been considered among the worst ever
List of movies that have been considered among the greatest ever.