By 'Big 7', I am referring to the original 7 members of Gardner Fox's Justice League of America or Grant Morrison's JLA.
What is your favorite storyline for each hero? Storyline is not specified to the JLA. It can be in their own book, in a special event, with another team, etc...
Superman - Kal El/Clark Kent
Batman - Bruce Wayne
Aquaman - Arthur Curry/Orin
Wonder Woman - Diana Prince/Diana
Green Lantern - Hal Jordan OR Kyle Rayner
Flash - Barry Allen OR Wally West
Martian Manhunter - J'onn J'onzz