For me: Father Brown/Sister Boniface. I'm a very lapsed, post Vatican 2 Catholic, and they hit my sweet spot of kinder-gentler-not-really-Catholicism plus nonviolent murders.
Middling!! We didn't want to fuck with learning whatever the deal is with the Count, but we went ahead with the king/robber expansion plus the River II and it was real fun. Really changed up our gameplay and strategy.