One of the goals of artificial life in the arts is to develop systems that exhibit creativity. We argue that creativity {it per se} is a confusing goal for artificial life systems because of the complexity of the relationship between the system, its designers and users, and the creative domain. We analyse this confusion in terms of factors affecting individual human motivation in the arts, and the methods used to measure the success of artificial creative systems. We argue that an attempt to understand emph{creative agency} as a common thread in nature, human culture, human individuals and computational systems is a necessary step towards a better understanding of computational creativity. We define creative agency with respect to existing ...