Shyness and being outgoing don’t have anything to do with it; it’s more about where we get our energy from. In fact, the differences are pretty simple:

Introverts get exhausted by social interaction and need solitude to recharge.
Extroverts get anxious when left alone and get energy from social interaction.
That’s it. There’s nothing about shyness, being a homebody, or how adventurous you are. Both types can be social, both can creative, both can be leaders, and so on.

Let’s Quit It with the Introvert/Extrovert Nonsense – Thorin Klosowski, Lifehacker UK (26 June 2015)

Read the full piece.