Top 5 Shows That Should Have Been Allowed to Finish (in no order):
1. Rome
2. The OA (*maybe* -- I'm still holding out hope that this is some too-clever meta plot device)
3. Terriers
4. Lodge 49
5. Carnivale
Honorable Mention: Firefly (duh)
ETA: Omitting Deadwood because it did get its movie. So did Firefly, I know. I'm sorry, that's just the way it is.
Firefly yes! I guess the movie counts. Sorta?Patriot (I guess Season 3 is still a remote possibility, but the more that passes, the less likely it seems)
And Patriot S1 was excellent. S2 was a drop off, for me. I haven't heard a thing about S3.