It is a discussion about teenages years or adults years for a human being is much happier. In my opinion, both of those two periods have happy and unhappy experiences.
From the aspects of the teenages. As teenages they do not have lots of concerns on economic issues, social relationships to deal with, and other events to worry. Firstly, teenages do not need to go to work to earn salaries, pay bills and housing issues. All of these problems have been solved by adults. From this aspect, they are happy, because it seems they do not have any economic burdens. Secondly, most of their time is spent on studying, which means they do not have complicated social relationships to deal with. From the reasons given above, the teenages years are happier. But most of teenages have to take part in other activities after their school time, as the society is developing, teenages are required more and more abilities to meet the development of society, sometimes, studying is the hardest and most difficult job in the world. Besides the required abilities, teenages own less freedom than adults, most activities are forbidden for teenages because they do not have enough experiences to hold those activities. Those are unhappy experiences for teenages.
From the view of the adults.Being adults means they have to take more responsibilities than their teenages years. They have to buy or rent their own department instead of living together with their parents, they have to pay bills by themselves, they have to make their own budget, what was worse, they have to deal with the social relationships by themselves. For example, when the adults make a mistake, they may be criticized, but if teenages make the same mistake, most of time such kind of mistake is accepted because the whole world knows that teenages are too young to have that kind of experience. The adults must have the abilities to dispel negative effects of one activity by themselves instead of replying on others. From those reasons given above, adult period is unhappy. But all of thing has both positive and negative aspects. From the positive aspect speaking, adults have much more choices than teenages, for example, they can choose the job they prefer, they can choose the department they love and they can even decide which place to go for a travel. At the time of making a vital decision, as adults is a happy feeling.
In conclusion, both teenages years and adults years have advantages and disadvantages, which one is much happier depends on how people plan their lives.