A nice person is a 'yes' person, whereas a good person is a person who accepts their responsibility in things and moves forward and tries to constantly evolve and isn't afraid to say no or challenge someone or be honest or truthful.
Look at the word responsibility-"response-ability"-the ability to choose your response. Highly proactive people recognize that responsibility. They do not blame circumstances, conditions, or conditioning for their behavior. Their behavior is a product of their own conscious choice, based on values, rather than a product of their conditions, based on feeling.
Each one of us matters, has a role to play, and makes a difference. Each one of us must take responsibility for our own lives, and above all, show respect and love for living things around us, especially each other.
I don't do celebrity endorsements. My work with Conservation International is a good use of whatever celebrity I might have to draw attention to important problems. I have the same responsibility as everyone to reduce consumption and to teach children to respect the environment.