As a teen, I never experienced the restlessness of youth. I never complained to myself about the great things I should be doing. I never felt oppressed by the expectations of the world and I never chafed against authority and opportunity. The words, "until I can get out of here," were always spoken by others and not by me.
As an adult I have come to have these feelings that I lacked as a youth.
More bothersome, as I approach the beginning of my third decade, none of the people that felt and thought this way fifteen years ago continue to do so. What did they know then that they don't know now? Likewise, the reciprocal.