You want to avoid describing an area of personal improvement, such as wanting to improve your golf game or cooking skills. The interviewer is only interested in areas of improvement on a professional level. When you identify an area that you could improve upon, it shows the interviewer you are self-aware of your faults and that you set goals and are motivated to grow.

"An area I would like to improve is to become better at speaking Mandarin. I learned Mandarin while living in China but never became fluent. My goal by the end of the year is to read and write fluently. I have signed up with a tutor who assured me I will be more than competent speaking and writing Mandarin before the end of the year."

"One area I have identified that I could improve is reading body language. I am an intuitive person and know when something does not seem right with someone, but I want to understand the clues related to their body language. I signed up for a body language training course that will enable me to develop the ability to interpret other people's body language and manage my body's communication to others."