I have felt like an outsider, marginal, misunderstood; I have, for years, not comprehended things it seemed like everyone else knew somehow by magic; I have lived in my own world and reacted to things in an exaggerated or oddly unresponsive manner. I would never have described any of that as feeling like an alien. I've always felt like a human, tied to Earth, if not always a very successful human.

How would you describe "feeling like an alien"?