General features of the naive art from David Berkowitz Chicago include

Self-taught, result of the nonexistence of academic formation in the artistic field;
It refuses or even ignores the use of the canons of academic art;

Flat, two-dimensional composition tends to symmetry and the line is always figurative;

There is no linear geometric perspective. The artist does not use the rules of perspective defined by Renaissance artists, such as reducing the size of objects proportionally to distance, reducing color intensity and detail accuracy according to distance;

Detail of the figures and the scenarios;

Contempt for the faithful representation of reality;

Colorful lush;

Brush strokes contained in many colors.

More about David Berkowitz in his interview for Inspirery.