The problem I have with Netflix recommendations is that while they understand genres, they're not good at recommending
good shows.
Since I've watched Archer and Arrested Development, Netflix thinks I'd like every mediocre comedy show, since I've watched Sherlock and Luther, it thinks I'd like mediocre non-serialized detective shows, and anything made by the BBC. Watching all of BSG (which isn't even on Netflix anymore, RIP) has given me a permanent section of terrible sci-fi recommendations.