Great TV shows don't always have great endings. It's been 17 years since Seinfeld signed off and people are still bitching about the finale — and don't even bring up the ending of Lost to the diehard fans of the show. (Poor Damon Lindelof will likely be taking shit for that until the day he dies, and you have to have sympathy for the guy.) Expectations go through the roof when any series concludes, with so many story lines having to be resolved and so many characters needing a proper goodbye. It's damn near impossible to get it just right — the people of Twitter are an unforgiving bunch — and Mad Men's final episode this month is bound to inspire a lot of bitching, moaning, and frame-by-frame analyses of its last seconds. We decided it was a good time to poll our readers and see what shows they felt ended on the best note. Here are the results.