[herghost]

There's a concept of an 'ambivert' too, which sits in the middle.

The popular understanding of introversion and extraversion has necessarily simplified the whole set up to 'loud, socialising people', and 'quiet, solitary' people.

Neither are true - both are caricatures of the truth.

I think it comes down essentially to how you recharge mentally - you do it in company by bouncing off others, or you do it alone.

Neither precludes the capabilities traditionally ascribed to either camp - introverts are perfectly capable of being social, as much as extraverts are perfectly capable of being cerebral.