Art is most often a reflection of the one creating it. You may see the artist using their favorite color(s), a theme or subject matter that is important to them, geographic indicators within the work, a particular or unique style, a preference of materials they enjoy using, or even the size of their work. Even if an artist creates work that is photorealistic, this identifies a value or skill that can be connected to that given artist. We can even see different periods in an artist's life be reflected in what and how they have created ( Picasso's Blue & Rose periods!). There are times that a commission may warrant an artist lay aside their personal aesthetic as to fulfill a client's wishes. However, when they create their own personal work.... it will once again reflect who they are.
As water reflects the face,
so one’s life reflects the heart.