On my opinion, being a teenager is difficult for severals reasons. In this period you need to make choices for your future (i mean you have to start to think about witch orientation you will choose for your studies) It's also the beginning of love reationship, and as everybody knows, love is a big deal to manage. Then, it's also the time to build our own personnality and asking ourselves who we are. And we also try to make a differenciation beetween us and the others, to be original. A lot of people do experiences during this period of their life, like trying alcohol, drugs and pushing the limits of the law and the nerves of their parents (sorry dad and mum!) own experience of a 30 guy who miss when he was a teenager :)