You see, somewhere in Geraltís training and mutation, something went wrong. Certainly the elder witchers, like Geraltís master, Vesemir, perceived some of the personality traits he retained as flaws. After all, what sort of ruthless killer could he be if his emotions are constantly there to cloud his judgment? He still does his best to be the heartless murderer the people expect him to be, however, for he has quite a reputation to uphold. You donít gain a nickname like the Butcher of Blaviken by planting daisies, after all.