For nearly two decades now, we have done without TV broadcasts in our home. We felt that TV as a whole was not worth watching. We do, however, have a TV and DVD set up so that we can rent DVD's based on our friends and coworkers recommendations. Over the years we have watched 24, Law and Order, NCIS, Bones, etc.
Once in a while we have come across series that have really aggravated me because both my wife and I have liked them, but it seems they suffered low ratings from what I will call low information people. Based on a few series we have seen, it is our opinion that any series should also have written into its contract that a wrap up movie should be included in case the series fails before the story arc is complete.
For example, we are fans of Babylon 5. Based on that we purchased Crusade, a spin off series. It just ends as if someone split it with a meat cleaver. It is frustrating because we enjoyed the series. Another one that comes to mind is Stargate Universe. While many Stargate fans seemed to have disliked the series because it is rather dark and not as humorous as the previous Stargate series, it is never the less very engrossing. Again it ends without a resolution. Another one that ended abruptly was Sanctuary, the Canadian SCIFI series about a refuge for Abnormals.
Firefly is another series we liked but it ended prematurely. At least in this case, a feature movie was produced a couple of years later which resolved the story line.So far other series we like such as House, MD, Castle seem to have a life of a couple more years which will have satisfaory or at least planned endings.