From Wikipedia:

Some popular psychologists have characterized introverts as people whose energy tends to expand through reflection and dwindle during interaction.

This, to me, is a very good description of my own introversion. Solitude, for me, is energizing, whereas extroverts would find it uncomfortable and dull. Ambiverts could probably take it or leave it. Too much social contact and engagement with others wears me out.

It’s not that introverts are more likely to practice introspection. Everyone does, but we introverts are recharged by it.

Also note that there’s massive bias and dislike for introversion in the world. Extroversion is considered the norm, what you’re supposed to be like, the personality indicator of “happiness,” and is usually associated with positive connotations. When people encounter us, the most likely response is “What’s wrong with them?” Notice the question wasn’t “Are extroverts more likely to practice extrospection?” (Yeah, it’s an actual word.) Introversion is pathologized, mocked, and derided as a matter of course.

It took me a very long time, suffering unnecessary self-doubt and conflict, to finally figure out that nothing about my personality type was defective. I’m completely fine as I am. I just happen to be on another end of the normal spectrum of human personality. This bias against introverts and introversion is slowly and surely being dismantled and we all are much better off for it.