No gunshots from me, bel. Roses, maybe. One of the worst things that can happen to a series is for it to be forced to go extra seasons beyond it's natural life span. When the producers, writers, and actors are ready to call it quits, it's time. The B5 example is perfect. When Joe thought he was going to be cancelled after Sea 4, he wrapped everything up, so Season 5 was cobbled on to the end. Another good one from the past is Magnum PI. They'd written, and filmed, a final episode which had Magnum being killed. Then the network made them do another season, and it sucked.
What would be great is if we got both a season 6 and then a movie. Why not ask for the world, eh?