The participation of dispositional factors (in particular the role of individual‘s nervous system) and phenomena of conscious, cognitive nature in the formation process of person's priority values were discussed in this article. The tight functional links between individual's typological peculiarities of nervous system, its general adaptational effectiveness, degree of subjective actuality of different level's demands and priority corresponding values also considered. The influence on person's priority values formation of mental processes of identification is also considered. That is directed to find optimal solution of most important existential problem of death, in fact, to realization of fundamental instinct of self-preservation, which takes on the human level the form of conscious aspiration to immortality. The empirical research results are given which confirm the existence of statistically reliable correlation between stenical or astenical peculiarity of person's nervous system and its orientation on the base of so called individual or collectivistical values.