To dream of a ballot suggests uncertainty around a very specific issue in your waking life. Possibly you are putting too much investment into other's opinion of your idea. Dreaming of a ballot paper is helping you become aware that you are responsible for your own decisions and not only is it unfair to rely on someone else to make your decisions for you, it is also the less personally fulfilling way to go. Weighing up the pros and cons may be quite helpful but following your heart is quite likely the best way to go.