When you leave a job, you want to leave on a good note. This means that you want to leave with people including your former boss thinking well of you. If you get angry and leave a job, this would cause problems. Usually, your next job will contact this former boss. You would not want them to explain the problems that you caused when you left this job. For me, my former boss would probably say that I am hardworking because I contributed a lot to the school where I taught.
Also, my boss would say that I am creative. I could teach students in a creative way by including many activities that the students found fun. Last, the boss would say that I communicated well with parents because I made contact with parents on a daily basis.