Its good to realize your mistakes if you will improve yourself that is positive result of self realization.
Does self realization mean assessing own qualities, capacity, good or bad points, potential. If so, this is good means of self improvement and pogress.
Self-realization is a process where 'self' is central.It is surely one of the most difficult processes as our powers are limited and we need help of external agencies to realize our true powers.Only exceptional mortals can claim to have it!
Self realization is the topmost stage of the need hierarchy.If this stage is attained, the person attaining this comes out of the vicious cycle of desires and worldly luxuries,greed and crime etc and start realizing his worth and can connect himself to God.