My name is Susan. I work as a personal assistant in writing a resume. A cover letter should demonstrate your enthusiasm, self-knowledge and personality. Unless you’re applying for a position as a stand-up comedian, however, don’t overdo the humor. The appropriate use of humor, and a convivial, professional tone can break the ice and engage the hiring manager – but the inappropriate, offensive or even unintentional use of humor can be the death knell for your job search. Sometimes doing something as simple as using a well-done, original cover letter template can be a good way to strike the right balance.