An essay stating career goals and personal interests should be organized, genuine, specific and realistic. Personal and career goals should be specific; avoid using vague descriptions of ambitions. Instead, use specific names, dates, descriptions and potential steps to achieve realistic goals. The tone of any formal essay of this type should always be professional, yet genuine.
Most essays that ask for career goals and personal interests are used either to gain admission to an academic program or land a job. Assuming one of those two is the case, there are numerous ways to personalize or direct the essay based on context. However, as with most types of essays, organization is critical. The essay should flow in a logical order and contain an introduction, main topics and conclusion. A common colloquial way to describe a formal essay structure is to write what is going to be told, tell it and then tell what has been told.
One way to check if an essay is genuine is to have a friend read it and ask if it seems accurate. If the friend says that it sounds like it is describing a different person, it is probably not genuine. While skills and accomplishments should certainly be highlighted, over-embellishment or overuse of meaningless jargon may be read as nonsense.