What a fantastic episode. Chilling, suspenseful, emotional, funny, and revealing. Everything I hope for from a Doctor Who episode.
As I said at the beginning of the thread, I got a strong The Shining vibe from the trailer and I certainly felt that throughout the entirety of the episode. The endless decorative 80's hotel hallways, the pictures as final resting places for people who have died, and the atmospheric music (although not quite as chilling as Wendy Carlos' score, but just as evocative). All that was missing was an elevator of blood but I didn't expect that from a family show.
I loved how everyone, including The Doctor (and us), thought the creature feed on fear and wasn't until Rita valiantly sacrificed herself ("Let me be robbed of my faith in private") did we see the truth. The truth that had been staring us in the face with Amy's repeated assertions that The Doctor will save them.
When The Doctor was telling Amy to stop having faith in him to save her, I was reminded of how The Fourth Doctor deliberately made Sarah Jane angry to get her out of a tight ventilation shaft in The Ark in Space. He hurtfully lied to both of them to save them. Oddly enough, I was reminded of Sarah Jane again when Amy said "You can't just drop me off at my house and say goodbye like we shared a cab."
When The Doctor first peaked into his room and saw his fear, I immediately believed what he saw was his own mortality. However, during his tearful goodbye to Amy, I think he saw the mortality of his companions. Not just Amy and Rory, but all of them.