I use https://www.metal-archives.com in this manner. The number of dimensions on which you can find connections and similarities makes finding new music a joy. A version of IMDB based upon the ideas in MA is what you seek.
Not sure if it's exactly what you're looking for, but I'm really happy with Taste.io for browsing personal movie recommendations. I think you should give it a try.
Spotify acquired them, and the new UI/UX makes it much harder to find musical "neighbors" and see what they're listening to, but I'll still check out what my neighbors are listening to once in a while if I'm looking for something new. I find it to be 10x better than Spotify's discover weekly playlists.
Not sure why nobody has done the same for movies yet - track and rate movies, find your "film neighbors", check stuff out based on what directors they have on heavy rotation.
Why is this practice so effective? I think it's partly because when we read we basically let another person directly poke at our mind for a while. And when you have a rich and subtle writer who really gets in there, over time you build up a whole different perspective. And when the writers you obsess over are all connected in some way, you can assume the same "perspective" (the same basic assumptions about what is significant, what is not) and naturally deepen your understanding in one area or another in a fairly unified way.
I think many of us have deployed this graph in our own lives. I watch movies this way - watch more movies made by a director I like. Then watch movies by the people this director likes. Its a wonderful exploration.
I wish there was a version of IMDB that allowed this meta exploration of movies - i.e. exploring the influence-graph for movies (or any art as a matter of fact).
There is a wonderful documentary called Connections [1] that explores this in the world of science, technology and engineering -- it traces the sequence of inventions and inventors that had influenced each other. I strongly recommend viewing it. You may find it very inspiring!
[1] https://en.wikipedia.org/wiki/Connections_(TV_series)