TIL a new word, which totally explains my teenage interest in the occult, Wicca, shapeshifting magic, etc. — although I did also have a syncretic New Age/Hindu/Catholic mother, which was the more obvious proximal cause.
Nothing really out of the ordinary - though of course I would as soon kick a puppy, as say so to someone in the throes of it! People deserve to enjoy themselves and kids deserve to be kids. But I do take "chuunibyou" (chūnibyō) as just part of what we do around that age, to begin the process of cleaving unto ourselves and defining who we are. It only happens English doesn't have a word for this aspect specifically; luckily for us, what it does have is a habit of mugging other languages for loose vocabulary.