This paper theoreticaly explains the entrepreneurs' personality and its strong and inevitable role in the enterprise business. In addition, the present discourses of the scientific study of entrepreneurial personality are highlighted in the paper, and particular attention is paid to the systematization and theoretical explanation of fifteen characteristics of entrepreneurs' personality, based on the work of Filion (2011) as the conceptual backbone of this work. Based on the personality constructs of recent psychological testing instruments of entrepreneurial personality, and in accordance with the nature of each interest characteristic, a questionnaire was created to examine entrepreneurs of micro enterprises (ME) in Croatian (CRO) manufacturing industry. The author's research engagement had several goals: (1) to identify the personality traits of CRO entrepreneurs based on these characteristics; (2) examine the correspondence of the identified personality types with the theoretical ones in Cunningham and Licheron (1991); and (3) examine the dependence of the firm's business on the characteristics of the entrepreneur's personality. Factor analysis on the collected data identified five personality types of entrepreneurs in the CRO manufacturing industry. The hypothesis that the categorization of types of entrepreneurs in CRO MEs differs from Cunningham and Lischeron's (1991) theoretical categorization was confirmed. Nonparametric tests correlate this test results with calculated enterprise performance indicators (financial position and buisiness performances indicatros) obtained from publicly available annual financial statements of the surveyed companies. An empirical research has established the independence of the financial position and buisiness performances of ME and the personalities of the entrepreneurs who manage them. It is important to mention that this kind of research has not been carried out so far on the example of CRO MEs.