Unless you're applying for a position where you are expected to take orders constantly and never actually think for yourself, being a good decision maker is a very useful skill to have, and critical to any upper management position. This question can be tricky if you're not prepared for it. There are negative aspects to being a very quick decision-maker and not taking enough time to think things over properly, and it's also not good to take a long time to make a decision when decisions need to be made quickly. As in many aspects of the job, it's best to strike a balance between being able to make quick decisions while being able to analyze the situation and different approaches properly.