I'm the same with Glee, once they'd won Nationals I couldn't see where they could go, and neither could the scriptwriters it seemed. When they started focusing on New York as much or more than the actual glee club the title of the show referred to I gave up, didn't even watch the finale or the Cory Monteith episode. I gave up on Revolution about 7/8s on the way through the first series as I found the female protagonist to be the most annoying character ever written. I feel like I've given up on NCIS even though I still like it, I finished season 7 but haven't seen beyond that through a combination of the UK scheduling being so impossible to keep up with (it's on 5 different channels each on their own episode trajectory) and that the DVDs are so expensive due to the popularity of the show.