OBJECTIVES Although previous studies have explored medical learners' 'most memorable' experiences, these have typically focused on patient deaths or mistakes. Drawing on multiple theoretical perspectives to understand the interplay between narrative, emotion and action, this paper aims to explore the whats and hows of written narratives of most memorable professionalism dilemmas: what types of dilemma are most memorable? When and where do they take place? How do students act? What characteristics relate to these dilemmas? How are dilemmas narrated?METHODS A total of 680 students from 29 of 32 UK medical schools provided a written narrative of their most memorable dilemma as part of their responses to an online questionnaire exploring the im...