While a super-cool utility, and one that brought this site to my attention, I'm having an issue with categorization; discovering many of the films appear on multiple lists. Some make sense, like "Blazing Saddles" as Comedy/Western and "Ghostbusters" in Action/Comedy, and "Dawn of the Dead" as both Horror/Thriller. But 1986's not-really-scary "Little Shop of Horrors" is Musical/Horror? The "Star Wars" series, full of tropes that identify it as science fiction, is under Action/Fantasy but not Sci-Fi , while "Superman" and the "Star Trek" films are. Strangely, "Deep Impact" is listed as Romance.
But I suppose it's all subjective. I'd have liked to have seen Animation broken out into its own category for additional comparison.