Attack on Titan. Many people seem obsessed over how amazing it is. I made it about 14 episodes in, every single one forcing myself to watch. I just couldn't stand it.
I ended about 14 episodes in as well. It wasn't a bad show in my opinion, but didn't have enough to keep me watching. Oh well. I'll watch the movie if it ever premieres in the US.
That might have been it too. The progression was just so slow, and with each episode being double length it just got boring.