There’s a continuum of severity to character impairments, ranging from mild character immaturity to severe character dysfunction. Not all the difficult people in your life will meet the criteria established for a true character “disorder.” But that doesn’t mean that some of these folks aren’t significantly disturbed characters capable of making your life miserable. The degree of character impairment a person has, however, does have a lot to do with how likely it is they might change (with the right type of intervention).