How do artists typically portray the Doctor's appearance in fan comics, given their customizable nature?

The Doctor's appearance is highly variable! Some artists depict them with a default male or female design, while others embrace the ambiguity and create designs that are androgynous or change frequently. Common elements include the white coat, the mask, and a generally professional or slightly weary expression. Many artists base their designs on headcanon or personal preferences, leading to a wide range of interpretations.