What do lecturers look for when marking essays? What impresses them and what frustrates them? In this paper, we present the results of a survey which asked lecturers to address these questions. Thirty-two lecturers responded to an email survey in which they listed the problems they found most frustrating when marking essays and the factors which most impressed them. This resulted in 206 comments related to sources of frustration and 139 comments listing factors which impress them. The comments were then coded into themes and ranked in order of importance by 16 lecturers from the original sample. The results highlight a range of issues that may be useful for lecturers when discussing assignments, and instructive for students when writing their assignments. (Contains 4 tables and 1 note.)