INTJ, baby!
Just as I was thinking more about the Atlantic article about introversion, I found out there’s an online Myers-Briggs typology test you can take.
I’m INTJ — Introverted iNtuitive Thinking Judging. Duh. Good descriptions of the typologies there. My INTJ score was I: 100%, N: 56%, T: 33%, J: 11%.