Sometimes, there is a beauty to something that appears unfinished. Artists will often sketch their preliminary ideas onto paper: unfinished figures and ideas waiting to be transferred to a completed oil on canvas, framed and ready to be showcased.
However, many are attracted to the organic gestures found in drawings and preliminary sketches: offering perspective into the artist's thought process. Often utilizing touches of different material, the incomplete seems complete enough to the viewer's eye.
Paper welcomes surprises, best suiting the need for an artist's burst of inspiration. Perhaps the audience can empathize and get right to doodling.