The first four movies, OHMSS, For Your Eyes Only, Octopussy, Dalton's two, and Casino Royale hit very close to Ian Fleming's books both in terms of the nature of the character and the plots. The others are wild flights of fancy. Craig has brought back Ian Fleming's James Bond to the screen, and that's a VERY good thing.

Read the books. They're awesome fun without being overly high-minded. You'll especially love stuff like Moonraker, Live and Let Die, and You Only Live Twice and how the stories blow their celluloid counterparts out of the water.