At the drop of a hat, Pete will tell you, in as many ways as one can imagine, that he is the most talented salesperson in the company. He often boasts about his ability to "size up" customers and to close deals. He says he has not been promoted to manager because his work is not really appreciated. He resents those who have been promoted and views them as self-promoters. He expects others to meet his wishes, but he is insensitive to their needs. Pete's behavior represents personality disorder.

narcissistic  

Explanation:

Narcissistic personality disorder: In abnormal psychology, the term "narcissistic personality disorder" is defined as one of the different personality disorder which is based on an individual's mental condition in which he or she consists of an unreasonably high sense of his or her own importance or significance, an exaggerated requirement of excessive admiration or attention, lack of empathy towards the other person, and troubled relationships.

In the question above, Pete's behavior represents the narcissistic personality disorder.

what is the answer

answer; beware of exaggerated claims without supporting evidence;