Since Giacometti achieved exquisite realism with facility when he was executing busts in his early adolescence, Giacometti's difficulty in re-approaching the figure as an adult is generally understood as a sign of existential struggle for meaning, rather than as a technical deficit.
Giacometti was a key player in the Surrealist art movement, but his work resists easy categorization. Some describe it as formalist, others argue it is expressionist or otherwise having to do with what Deleuze calls "blocs of sensation" (as in Deleuze's analysis of Francis Bacon). Even after his excommunication from the Surrealist group, while the intention of his sculpting was usually imitation, the end products were an expression of his emotional response to the subject. He attempted to create renditions of his models the way he saw them, and the way he thought they ought to be seen. He once said that he was sculpting not the human figure but "the shadow that is cast".