Which term best describes cultures that emphasize the importance of knowing oneself, being self-sufficient, and being true to what one wants in life?

These are known as Individualistic Cultures.

In such cultures, there is huge importance on the rights of each person. These include social rights, rights to privacy, business, freedom of expression etc.

In such cultures, the right of one person is as more important than the right of a certain group of people.

Such cultures celebrate the individual life and emphasize the importance of knowing one-self and being self-sufficient.

Most of Western Europe and Northern America is seen as an individualistic culture, where family values are not that strong.

In contrast, Eastern cultures highly emphaize the importance of a collective, group mentality, where family, creed and race are highly celebrated.

it´s related to his charming character.

beauty is not everything, although we can joke that girls only care about the physical or material aspect, the truth is that a real woman looks at more important things, besides intelligence and personality, there are other attitudes that make irresistible to men who are 'unattractive'.

for example develop your sense of humor.