It is well known that Ennius stands out among the early Roman writers by being active in a variety of literary (mainly poetic) genres. It is also obvious that there are clear distinctions in form and themes between the different types of works in line with their generic identity; at the same time, some stylistic features, motifs, and concepts may be observed in works assigned to different literary genres. This chapter explores such items in Ennius’ corpus and discusses the respective role of generic distinctions. Such a study contributes to identifying typical aspects of Ennius’ output as a whole as well as to describing specific generic manifestations.