My teenager years are in junior and senior high schools, where is neither a place to develop skills nor a place that could offer enough time to encourage students to do that. Instead, they emphasize High School / University Entrance Exams and make students have no time to do anything that is not beneficial to scores.

Though I've got some skills in university and postgraduate education, that's not a skill that got in teenage ages.

And I think it's quite hard to have a skill that can last a lifetime.