Best villain of walking dead was Shane. It started going down hill when the governor invaded the jail and no one shot him on sight. They had a few good ideas like terminus and when they first got to Alexandria but never went anywhere with the conflict. And haven't used the zombies as any legitimate threat in years.
Leftovers is is an awesome awesome show. I like season 1 better than 2 but both were great. There was an HBO show carnivale which ran years back that had similar intrigue.
Right ht now I need something new that's good. Many shows I liked:!!Dead, Arrow, Flash, Suits, even thrones have just been getting worse and worse.
I hope Saul and another season of west world can rise up.