This question is another variation to the weakness question. You can provide a similar type of question unless it is the same person asking them. To answer this question, think of a person you respect and the trait they have that you really like. I used to have a manager that was very patient and explained things very carefully. I really liked this trait, so I'm going to provide the long answer by using this example. But first, let's look at some short answers.
This is a little long, but if you can speak smoothly, it shows off your communication skills. Also, the content of the answer is not that bad. They want a personality problem, and this answer is showing impatience while indicating that you understand difficult concepts easily. It also shows that you are working on correcting the bad behavior.