Emotional Support Cobra said:
Longmire sucked! I was so mad they ruined their dynamic! Loved the show up til then.
I thoight Parks and Rec was good. Supernatural was bad-I just consider the penultimate episode to be the finale. Or purists would argue it ended at Season 5.
I always liked the Sopranos ending, BB, and Justified.
Honorable mention for worst: Dexter
I said I have a soft spot for Longmire

. Agree with the consummation of the Walt/Vic physical relationship wasn't ideal, but I thought it otherwise hit all the notes and I loved Walt riding off in search of the treasure to end it. If not for the Walt/Vic part, I would have had it much higher on my list.
Related note - generally, every series that consummates a romantic love interest that provided sexual/emotional tension throughout the series (which usually is what helps make it great), ruins it when they give in and have them together. It takes good writing and discipline not to do it and still make the show great. It is usually lazy or pandering to the audience to give in. I can't think of a show that was better for it and plenty that were worse for it (I'm still mad about Moonlighting getting ruined back in the day).