When I was growing up, almost everyone in my age group idolized the McLaren F1, and almost everybody who was a little older was besotted with the Countach. These are the cars whose posters adorned many a budding enthusiast’s wall, but the older I get, the more out of touch I become with what “the youth” really wants in a car. So what does your kid like most, and why? Which car turned them into a fanatic, and what’s their favorite thing about it?