Plot: Before I make my case, let me just tell you that I know the aliens are lame as hell and totally confusing and dumb. But every other aspect of this season is dazzling. Lana Winters has one of the most compelling storylines in the entire series. It's impossible not to root for her, and it's so satisfying when she finally closes this book for good. An asylum is a classic and excellent place to host a horror story. The contrast of the religious leaders of the sanitarium and the presence of the devil are undeniably rich. This season embodies "horror" in so many ways. We get the classic horror of serial killers and demonic possession with the modern human horrors of rape and murder and institutional corruption. And I'm sorry, but there's nothing more iconic than casting Frances Conroy as the Angel of Death. Those wings, mama! There's even a well-placed musical number, for f*ck's sake!
Ending:Asylum is also my favorite because it has the most full-circle ending of all the seasons. I like that we see where every single character ends up. There are no loose ends or forgotten side plots. (I mean, we all hate the aliens, but we know how that whole thing ends, you know?) It's invigorating to see Lana Winters kill Bloodyface and then kill his son. And Sister Jude delivers one of my favorite lines in the entire show. It's a slice of dialogue that seems to encapsulate the kind of horror AHS returns to season after season after season: "All monsters are human."
Scariness: Don't even deny it: Asylum is NIGHTMARES ALL DAY LONG. The possession of Sister Mary Eunice is so haunting, and watching her wreak havoc on Briarcliff is so much yes and no at the same time. Don't even get me started on the messed-up, murderous Santa Claus man. I still have horrified flashbacks to what remains of Shelley after Dr. Arden does his experiments. And what the hell are those terrifying monsters in the woods that Sister Jude has to feed? Then there's the real monster of the season: Dr. Thredson himself, aka Bloodyface. Nothing will be able to erase the realization that his home is filled with skin furniture and that he wears a human face mask when he does his dirty business. American Horror Story took one of the scariest possible season locations and owned it. And that's why Asylum will always be my number one.