I think it's a bell curve and most of us are ambiverts:

An ambivert is moderately comfortable with groups and social interaction, but also relishes time alone, away from a crowd. In simpler words, an ambivert is a person whose behaviour changes according to the situation they are in. In face of authority or in presence of strangers, the person may be introverted. However, in the presence of family or close friends, the person may be highly energetic or extraverted.

https://en.wikipedia.org/wiki/Extraversion_and_introversion#...