User blog comment:20thCentFopp/Egghead: All Talk, No Walk/@comment-2031194-20131105131505/@comment-23748647-20131105151605

The Hulk, in it's original form, was a Jekyll and Hyde story. Bruce Banner was human by day and Hulk by night. He did not switch out of rage, but would switch into the purple monster (because the original Hulk was purple) when the sun set. Hulk was not set up as a superhero, but as a villain. Bruce Banner was the hero. This story was not well received and was canceled after 6 issues. It was his cameos in early Avengers that reignighted fascination with the character. They overhauled the character, and moulded the villainous traits to resemble the King Kong, rather then the Jekyll/Hyde model, and rebooted him as a companion piece to Human Torch in Strange Tales. The feedback was much better. So essentially, even though Hulk was present in the Early Silver Age, he was not the Hulk that became the Marvel mainstay.