Serenity.
I wasn't part of the 'original run' of Firefly fan base, but when I read the story I get the filling that it lived and surpassed the hype by a wide margin.
The series is excellent, and this is the only example I can think of (at the moment) of a movie based on, or continuing, a good TV series that was actually worthy of its inspiration. Chiwetel Ejiofor almost steals the show, he is so good.
