If they only happen because a social context I would call that normal, if you also have a core personality. I have met the odd shapeshifter that do not and only borrow traits from others, and when asked what they personally like and think, they lack an opinion. That I can't say is normal. But otherwise all or most people adapt to the social environment.
I don't see myself as abnormal either even if I have a weird sense of self. I tend to see smaller details than people do, not see the wholes people do, and see different patterns. Like many aspies I hate when one detail doesn't fit (in general) so I realize now it is why I also create a sort of inner conflict. Other people can easily accept a whole where details are wrong, they just simply ignore them. I seem not to be able to. Which causes a pretty fragmented self.
As a pattern seer still, these fragments find connections and build up new personas where there are no conflicting details. It can be like an inner subculture even, where a taste of clothes, music and food goes hand in hand and creates a persona.
Who is in charge seems a little like a will thing. Mr Evil was the true me for a long time, he did not think something else was possible in a true sense and was repulsed by the thought of Mr Niceguy being created. It was a violation to who I truly was. When Mr Niceguy actually had been built, Mr Evil became more and more distant and now I feel like Mr Niceguy is my true self. I can hardly lure Mr Evil out anymore. The change was a conscious decision.
Mr Niceguy now bores me. But there is yet "someone" else to step in...
