Hannibal, I really loved that show creepy yet beautiful art. The third season I think hurt it when Hannibal fled to Italy but I still loved the show, I really would have liked to have seen it go five-six seasons.
Ash and the evil dead - Come on, all horror fans dreams came true with this series. A solid three seasons for any fan of the Evil Dead Trilogy cancelled after just three seasons. Not going to lie this one hurt because it was to good to be true that at even came around, plus was just as funny and crazy as the movies.
Twin Peaks lasted two seasons one of my favorites shows ever. I like about 90% of David Lynch material this was one of them.
I could have included more like Freaks and Geeks and Constantine but I felt the three I listed were the biggest three for me personally.
I am going to have to give this a look when I see something brought up a few times I watched one or two episodes but maybe I made the mistake of watching it not from the first.