What film, show or game that is not necessarily 'underated' didn't have the level of social impact it deserved.
What's the antithesis of Arrested Development, Firefly or The Big Lebowski? Those may never have 'found their audience' but over time seemed to recognised by everyone. What are the deep cuts that you liked but it feels like everyone has completely forgotten they even existed.
Co-created by Graham Linehan who also did Father Ted and The IT Crowd. Shows about misanthropic priests and IT dept guys with idiots for sidekicks. It's a winning formula.