This study analyzed eight Taiwanese English as a foreign language student teachers' metaphors to explore their self and professional identity. This study has four major findings. First, metaphor writing was able to reveal important information about student teachers' professional identities. Second, in terms of teaching demonstrations, metaphors written by those who taught and those who observed were different, being seen as variously as an "adventure" or a "carousel," for instance, due to their different teaching and learning experiences. Third, their metaphors or metaphor discussions were not in-depth revelations of their understanding and knowledge of English language teaching. Fourth, these participants held positive attitudes toward metaphor writing, analysis, and discussion as "useful for reflection."