The field covered by psychological and praxiological sciences in reference to individual decision making is deficient in order to make theoretically and existentially desirable decisions of a strict ethical qualities - be it on political, social, business and other issues. The preference of values underlies any decision making, if the conclusion is not going to be random or apparent. This act of preference is never of a strict ethical nature. Simultaneously, it is ever ontological and cognitive. This act of preference as a basic option is located ever in man's existential sphere. The learning of decision making - as personal decision - ought to recognise the existence of ESSENTIAL relations (open/secret; aware/not aware) in respect to the being, implicating the VERY FUNDAMENTAL act of value preference.