I liked the first season of American Horror Story. I felt myself checking out during the second, even though I heard that was the best (sometimes I'm not in the mood and revisit something and I find I all of a sudden like it).
I liked the Dahmer series, and found it was rather close to the source material (of ... you know, real life). Not sure how much we needed more of him, but I'm the hypocrite that watches it.