I love AHS, and still do, although the first season was the only one that truly deserved the word "Horror" in the title. The subsequent seasons were...disturbing, amusing, and strangely charming, all at once (the Freak Show episode about Pepper's story nearly had me in sniffles). I love that the show is not afraid to go dark (Tate shooting up his school, the rape and victimization of the women in the asylum, what Mme. LaLaurie did to her slaves, the murders of the freaks to sell their body parts to the museum). That's the point. It's supposed to bring us to these dark places, to confront us with the ugly parts of ourselves.
And from what I've been reading about Madame LaLaurie, she actually got off lightly in the show.
[Edit] I do have one complaint, and that's how...disjointed the show seems to be at times. It rarely sticks to a linear format, instead jumping back and forth in time without warning. The effect can be...disorienting, and occasionally made me wonder if I somehow missed an episode here and there.