I'm responding to note my frustration with simple filtering by RT rating...a lot of movies have a high RT rating, but with very low confidence (e.g., 75, because 3 of 4 obscure reviewers liked it). You want want to filter by confidence also, but the interface doesn't allow it. It's frustrating because it's so close to solved; all the hard work of gathering the data is done, but the filtering is slightly too simplistic.
http://netflixroulette.net/ is also an alternative for finding a movie to watch, it's just a roulette. The author also made the API for everyone to use since Netflix shut down their.
What I would actually need is a way to choose from the many movies worth watching.... but the hard part is doing so without choosing a movie not worth watching.