In the world there are a large number of professions. The chef, chauffeur, astronaut, teacher, manager and many others. Each profession is good in its own way. Each has its pros and cons. Choosing your path, should be guided primarily by their aspirations, that to which you are drawn, what would you like to engage in and benefit themselves and society. The second rule in choosing a profession - is considering its features, characteristics of temperament and health.
I, for example, as a child dreamed of becoming an astronaut. But growing up, I learned that the astronaut should have very good health. Various diseases, even a minor in your opinion, are a serious contraindication for spaceflight. After all, there is a person in an emergency situation. So I can not become an astronaut. I have poor health. Then I wanted to become a teacher. All important and necessary profession.