His short stories may often touch on themes of morality. Characters could be faced with difficult moral choices, which makes the readers think about right and wrong. Also, themes of survival in different situations, whether it's in a social or physical sense, could be present. For example, a character might have to fight against the odds in a harsh environment created by Guzikowski in the story.
Aaron Guzikowski's short stories might explore themes related to identity. Characters could be in search of who they are or struggling with their self - perception. Another theme could be the relationship between individuals and society. He could show how society influences characters and how they, in turn, react to it. His stories may also deal with themes of power and powerlessness, where characters either have or lack the ability to control their own lives or the situations around them.
One common theme could be human nature. He might explore the good and bad sides of people.