When you watch Netflix through your web browser you see titles sorted into obvious categories like Action, Comedy or Television Shows, with a web address that looks like this- http://www.netflix.com/browse/genre/10757
The number at the end indicates the genre, in this case "British Movies", and by changing that number you can discover all kinds of super specific categories you wouldn't see otherwise.
You can see a full list of the extremely specific "streaming by type" categories on Netflix here, such as Action & Adventure based on real life from the 1980s (1051), Gritty Chinese Action & Adventure from the 1980s (208) or Violent Cult Movies from the 1980s (3539).
Some of the links on the list don't work, which isn't surprising given Netflix's ever changing selection, but those that do may turn you on to some new movies you may not have stumbled upon otherwise.
-Via Gizmodo