It was also during this period that he developed and defined various themes and visual considerations. These diverse methods of manipulation of steel and compositions of diverse themes or areas of interest, along with his direct process, manifest themselves in large bodies of work. There is a large portion of his work that has been labeled non-objective. Fitzgerald insists that there are evident visual relationships to the human experience, whether this is in abstractions of the human figure, experiences of natural objects, or even implications of nature (such as life, growth, evolution and metamorphosis). These relationships can extend to animation, anamorphic, or exclusively human experiences such as architecture, geometry, written language, or even the ordinary objects exclusively human in nature such as chairs, machines, and dishes. Fitzgerald has stated that in the beginning of each work, he is dealing with format, aesthetic relationships and considerations. Thus, through his composition, the relationships he develops between the formal aesthetic aspects help to define images, symbols, and abstractions, which he believes speak to the human experience. This allows the experience of his sculpture to have multiple and various effects on the viewerıs experience. As all human beings have a different history, it is these personal experiences that they bring to the viewing of Fitzgeraldıs sculpture that defines his work. Most of Fitzgerald's sculptures are untitled. He believes that titles tend to solicit an experience, or define or dictate a specific response. He says that he is more interested in what the viewer brings to the experience of his work. Thus, the work has different meanings to different people. He says that when he is finished with his sculptures, he is finished using his imagination, and it is time for the viewers to use theirs. The common thread shared by all of his sculptures is the method of direct and often spontaneous aesthetic decision lured by the quest for new and novel experiences. He contends that the human experience is deepened and enriched whenever new experiences are added to the greater pool of experiences as a whole.