> I can't imagine many 15-year olds trying coffee for the first time, thinking "this tastes awesome."

If that's your litmus test then no one would eat (warning: polarizing list approaching) durian or Vegemite or lutefisk.

Acquired tastes are a thing. I personally used to hate olives and now I love them, and they don't, to my knowledge, induce positive psychoactive effects that would create a Pavlovian response.