Some people experience changes in personality. Others retain the qualities they have always had: the person may always have been sweet and lovable and remain so, or he may always have been a difficult person to live with and may become more so. Other people may change dramatically, from amiable to demanding, from energetic to apathetic, or from constantly cranky to very likable. They may become passive, dependent, and listless, or they may become restless, easily upset, and irritable. Sometimes they become demanding, fearful, or depressed.
