lasted 6 seasons and I enjoyed them all. DS9
lasted 7 seasons and I enjoyed them all. Conversely, I bail on most shows after checking out one episode.
The only moral to the story is that there's no moral to story. Some shows are worth watching; most aren't. Some shows have one good season in them (Prison Break
) and others, managed correctly, could go on indefinitely (Heroes
or a Star Trek
series that returned to the TOS approach).
The length of time a show should run is determined by the premise.