I have played every Carol Reed games, each with a completely new and original story. I have enjoyed every game in the series of 10 games, the latest being Bosch's Damnation. All the games have the same format about them but I never tire of playing the games. The puzzles are many and vary, with some being quite challenging. I have played some Nancy Drew games and they are nowhere in the same calibre as the Carol Reed games.
Another thing I love about the game is waiting to find out where the developer makes his cameo appearance. Mikael Nyqvist makes an appearance in most of the games, ranging from a cross dresser to a megalomaniac. Another cute guy, Bigge is also in all the games. I love his tattoos and beard. The characters in the game do have a real character about them.
The game also has a great inbuilt hint system in case you ever get stuck anywhere, If that doesn't help, there is always good old (young) MaG to help you out with her walkthroughs. I would suggest Scotty to play one of the games, Maybe Amber's Blood or Black Circle and see what you think. You will enjoy it more than Nancy Drew.