Whenever you work for any company, you should have to happy. If you won't happy, it reflects on work. So, all can be decreased. When you happy then only you share positive to others and he/she become happy.
The word happy connected with Workplace culture, learning new things, management support, job security etc.
A positive workplace culture improves teamwork, raises the morale, increases productivity and efficiency, and enhances retention of the workforce. Also it reduces the stress of the employees.
So be positive and never be unhappy for life, because life connects with all of the parts.