I'd say that happiness is one of the BEST things anyone could experience, especially for the older society, since we are usually stressed with work and "love life" at these times of our years.
We teens are mostly happy today since we are surrounded by our friends and family who continuously support us. In fact, it's usually hard for us to think about where we'll be around 10 years from now, are we still close with our family? or are we still friends with our high school friends?