Being a Sagittarius born on December 18th, your charisma and risk taking define you. With people you are warm, friendly and clever. These appealing qualities are met well with your comfort being the center of attention. Although others may enjoy your warm social qualities, you are admired for your fearless pursuit of success. If you feel the reward is worthwhile, you do not mind risking complete failure. These combined qualities have made you popular with your peers and coworkers throughout your life.