The Lee/Ditko and Lee/Romita Spider-Man (in the first 4-6 Essential collections), good old days when a whole story could be done in one issue, also interesting character changes over the years, at least "The Death of Gwen Stacey."
For Batman: "The Greatest Batman Stories Ever Told," "... in the Forties," "The Killing Joke," "A Death in the Family."
Also a fan of 90s era Green Lantern, "Emerald Knights" might make you a fan or confuse you.
For Batman: "The Greatest Batman Stories Ever Told," "... in the Forties," "The Killing Joke," "A Death in the Family."
Also a fan of 90s era Green Lantern, "Emerald Knights" might make you a fan or confuse you.