I liked Kapu Cave - I loved the fishing & shell collecting. And I loved the snowfights in Wolf Creek. There were no ND games I didn't like.
The only puzzle I could not do was the horrible sewing one, can't remember which game that was.

I would have to say it was a tie between Blackmoor Manor and Capu Cave. I love old houses and had so much fun diving for shells. The only one I haven't played is Danger by Design. I'm just a big kid. I never outgrew Nancy Drew.

I have to cast more votes for Ghost Dogs and Royal Tower! My least faves are the more recent ones - Old Clock (HATED that silly car), Danger by Design , Kapu Cave. Seems like they are adding more silly "collecting" type puzzles that don't really have much to do with the story!