I have noticed that being introverted equals being shy and insecure, according to some people. Hahahaha, That's also a misunderstanding. Of course, this happens but it's not a rule. I started my life as an extreme introvert (almost invisible), a bit shy but never insecure. Later in life, I had some moments when I switched into being an extrovert (especially during my years as a student at the university, far away from my hometown).
Nowadays, I am more like a hermit, always at home or in my garden, a few talks with neighbors now and then, but mostly alone, almost invisible again. BUT, as soon as I go teaching (workshops, classes), I switch back to extrovert. Someone who wants full control of the group processes. After work, I just take out that coat, hang it on a tree and go back home into my beloved silence.
My husband is a bit the same. Extremely silent and anti-social at home and under certain social circumstances he is annoyingly loud, witty, and social with people.
I guess introverts are more receptive to energies, memories of past lives, and deeper thoughts about life. They shut down on a regular basis to regain their energies while being alone. I couldn't live and survive without my daily hours of being with myself. And paradoxically enough, these hours make me feel connected to the whole world. I am a kind of radio receiver, and I receive a lot of 'junk mail', junk energy from random sources. I process a lot of weird flashes, and false memories. As if I am tapped into an unfiltered Google search inside my head. I don't care, btw, because sometimes I can bend this stream and use it for my own purpose.