I only really started watching B&Ws in the last 5 years, I now consider myself to be fairly knowledgeable.
Here are the great Noirs and quality B&Wsthat must be awatched if you are to consider yourself an afictionado
Double Indemnity
The third man
Post man always rings twice
Mildred Pierce
Sunset Boulevard
Mr Smith goes to Washington
Its a wonderful Life
Maltese falcon
All about Eve
Gaslight
Manchurian Candidate (original)
Lolita (original)
Rebecca
Shop around the corner (this was later remade as "you've got mail" only this ones actually good)
Streetcar named desire
whatever happened to baby Jane
Roman Holiday
Hitchcocks
39 steps
Dial M for Murder (was originally B&W) Paltrow remade it very poorly
Spellbound
The lady Vanishes (was later remade as "flightplan")
Some night when any of you are bored get the original and then watch the remake, its like the difference between first drinking a quality beer then following it with a bud light.
That's a list packed with classics. Any list would never do justice to the massive body of work that exists in B&W. The list would also cover all genres: comedy, drama, western, war, etc. Each category has a couple dozens (or more) brilliant entries. In comedy there's arguably the great in "Some Like it Hot", in Western there's "High Noon", in Science fiction there's "Metropolis" (B&W and silent), in war there's "All Quite on the Western Front", in drama there's "Citizen Kane". These films were made by the industry's greatest directors, starring it's greatest actors and made by some of it's greatest technicians.
Great directors like John Ford, Frank Capra, William Wyler, Alfred Hitchcock, John Huston, Michael Curtiz, Cecil B. De Mille, George Cukor, Howard Hawkes, Fritz Lang - another extensive list.
Actors like Cagney, Bogart, Davies, Crawford, Wayne, Grant, Hayworth, Astaire, Garson, Welles, Donat, Tracy, Robinson, Cooper, Hepburn - yeap, another extensive list.
This sea of work sadly is being ignored or side-stepped simply because some don't like B&W.
Bizarre.