Well you have cultural normal. Like shaking hand, or bowing. ECT...Then there are scientific normals. Everyone one grows, whether a lot of little,(physically speaking) normal vitals, ECT...
As far as a normal personality. I don't think there is such a thing. Normal means a pattern. No one person is alike, nor do they act or react the same. You can have similar behaviors. But that does not classify a person as normal or weird. It just classifies their behavior. Society tries to put to much restraint of things. Makes em feel better. Am I crazy or weird because I like dancing in the rain? Other than me who has the right to categorize my action as weird or normal?
That's my two cents on that matter 😁