To be efficient and satisfied in his/her profession, a teacher needs to realize adequately his/her strengths and weaknesses. To support development of self-reflective skills by future teachers, students at Department of Economic Teaching Methodology at University of Economics in Prague were asked to write an essay called 'Why am I supposed to be a good teacher?' Content analysis of self-reflective statements and participants' personal construct of expert teacher bring important feedback information about skills that should be trained during the education of prospective teachers. Participants consider the self-reflective essay as enriching method that helped them to realize their strengths and weaknesses and to develop their self-reflective skills as an important part of professional expertise.