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Given the following post, respond as if you're commenting on Reddit:
human
[Spiderman] Did Norman Osborn always have the Green Goblin personality, or was it brought on by the serum (or however he became the Goblin)?

In a similar vein to the personality of the Hulk always existing in Bruce Banner's mind (due to psychological trauma as a child), did Norman always have a fragment of GG in his head, or did the Goblin develop after Norman became empowered?
gpt
He was always a bit of a bastard who was cruel to animals in his childhood, neglectful and harsh as a parent, and a mean, grasping business partner, all a product of a bad upbringing. 

But he probably wouldn't be a giggling homicidal maniac without the Goblin's influence.