There are several ways to appreciate a person. People have many different ways that they can make a positive impact, either to an individual, or to society as a whole. To add value to existence.
Some individuals are titans of industry, creating jobs and wealth. Some are scientists, advancing our knowledge of the unknown. Still others are good friends, or good parents, or good neighbors. And, of course, it is possible to be more than one at the same time.
Of course, different people appreciate different things in others. To one person, punctuality might be a valuable trait, but to another it is unimportant.
What about you? What do you think gives a person value? Is one person more valuable than another? What makes them so? Is there a difference between value to an individual versus to society?
However, there is also the idea of negative value. Some people might take more from others or from society than they provide in return. They might steal, or be selfish, or harm others in some way.
Is there a point at which the value of an individual drops to zero? Or does everyone, no matter how bad, have some value? What does our societal institutions, like the law, our government, and religion have to say about human value?