I've narrowed my next AP down to Carrion Crown or Curse of the Crimson Throne. I haven't ready any of CC yet but my players all like gothic horror so I'm going to look into that as well.
Here's my question: My players are really into the RP aspect of the game and not so much the hack/slash part. Every Pathfinder AP I've read through is so monster heavy...is there an AP that is low on the monster/badguy side?
No, not really. But between those two APs, Curse of the Crimson Throne has a much stronger focus on human villains. Carrion Crown has more monsters -- but of course each as plenty of the other as well. Personally, I'd recommend you try CotCT.