What term best describes a trait of having a self-centered interest in one's physical appearance?

The term that best describes a trait of having a self-centered interest in one's physical appearance is "Narcissist." Narcissism refers to an excessive preoccupation with oneself, particularly regarding one's physical attributes and personal admiration. This characteristic often includes a belief in one’s own superiority and an insatiable desire for attention and validation from others.

In contrast, humility represents a modest view of one’s importance and involves an understanding and acceptance of one's limitations, which directly opposes the self-centered focus of narcissism. Selflessness indicates a concern for the needs and well-being of others over one’s own interests, again contrasting sharply with a narcissistic viewpoint. Timidity describes a lack of self-confidence and a tendency to be shy, which does not align with the self-focused nature of narcissism.

Thus, the concept of narcissism encapsulates the essence of someone who is primarily concerned with their own appearance in a self-centered way.