From comparative research on the constitutional development in Central and Eastern Europe and also from the longstanding debate on whether parliamentarism or presidentialism best facilitates democracy, it is apparent that there has been and continues to be, a certain degree of confusion concerning the concepts of semi-presidentialism and presidentialism. Different scholars mean different things by the terms and different scholars therefore classify countries differently. In this article I argue that using the conceptual dichotomy between pro-premiär (premier-presidentialism) and pro-president systems (president-parliamentary systems) provide the best solution to several of the problems related to categorising constitutional types, most importantly perhaps to the presidential power dilemma. I, furthermore, employ these concepts on the post-communist constitutional systems and try to reveal clear patterns with regard to presidential power, geographical region and democratisation.