The narrator calls himself nervous instead of mad because in the story he claims to have full control of his mind and that he’s not mad just that most of his senses got enhanced. for instance The narrator says “IT’S TRUE! YES, I HAVE BEEN ILL, very ill. But why do you say that I have lost my mind, why do you say that I am mad? Can you not see that I have full control of my mind?” This quote Highlights that the narrator wasn’t mad at all and even seems confused when being accused of being angry. Another key point would be when the narrator states “Is it not clear that I am not mad? Indeed, the illness only made my mind, my feelings, my sences stronger, more powerful.” This quote reveals that he may have not been angry but he could have felt a different way possibly nervous. Overall this tells us that the narrator might have been someone who kept to himself.