Анютка101 To begin with, I'd like to day that hobbies take a huge part of our lives. 
Hobby is something that you are interested in. Whatever it is, swimming, drawing, dancing, reading, knitting, learning english - it is something that you do with passion. If you do something passionate you are going to have a satisfying result.
As people say: "Time you enjoy wasting is not wasted time". I totally agree with the statement. Nowadays people are very busy and spend the most of their time studying and working, and everybody has to take some rest. So, hobbies are the best to spend time doing something that you truly love and just relax.
I have got a lot of hobbies but my favorite one is probably drawing. I love drawing. I think that this is such a huge sphere which includes so many styles and directions in it! Drawing is expressing yourself and it's always great to capture moments and thoughts on paper. To show the world in the way you see it and share it with people.
In my opinion, hobbies for teenagers nowadays are very interesting since we live in 21th century. We are provided with technologies so many directions of development open to us. I can think of some of the most common hobbies, like music, photography, computer science, social causes, arts and plenty of others.
That is why hobbies are permanent part of our lives and we should spend much more time to our hobbies.