Pull List; seems to be too long to fit in my sig...
Final Crisis is the best comic I've read in years.
That out of the way:
80s - Whatever Happened to the Man of Tomorrow
90s - Reign of the Supermen (aka The Return of Superman)
00s - Secret Identity (though Red Son is close).
10s - I'm still waiting....
30's- ACTION #1
40's- SUPERMAN #61 "Superman Returns to Krypton", The "K-Metal" story
50's-ACTION #242 (first apperance of Brainiac)and ACTION #252 (first Supergirl, Metallo)
60's - Superman Red/Superman Blue, The original Jerry Siegel "Death of Superman"
70's- "Kryptonite Nevermore" and the rest of the Sandman Superman Saga, "Must There Be a Superman?" , ACTION #500
80's "The Amazing Return of Jonathan Kent", ACTION #544 (the revamp of Lex and Brainaic) "All three of Alan Moore's Superman stories, Crisis #7 (the Death of Supergirl) The Man of Steel, Superman #9 (the Luthor screws with the life of a waitress story) ACTION #600
90's - "Exile" "Day of the Krypton Man", Time and Time Again, Most of the Triangle era from "Return of the Krypton Man" through "The Fall of Metropolis", "The Death of Clark Kent" The whole Dominus arc from the 60th anniversary time split story through "King of the World". Morrison's JLA run
00's The Loeb/Kelly era from Superman #151 - through "Our Worlds at War".... "Birthright" The Rucka "ADVENTURES" run, "Up Up and Away" The Johns run on ACTION, The Busiek SUPERMAN run, The Beginning of New Krypton. ALL STAR SUPERMAN (duh)
10's- Morrison's ACTION run, ACTION #19. Superman #0.
60s - “Return to Krypton” (Superman Volume 1 #141) (1960)
70s - The Amazing World of Superman: Metropolis Edition (1973)...my favorite telling of Superman's origin
80s - "For the Man Who Has Everything" (Superman Ann 11)
90s - the entire Death and Return of Superman saga
00s - All-Star Superman (easily)
10s - Who cares, Superman is now dead as a comic character thanks to the New 52
DC discarded their history, and now has none. DC will always be in the shadows of their past work.