Aries natives are known for their tempers, owing to their ruler Mars. You don't like obstacles in your way, and prefer to always be moving toward your goals.
Since you're a Fire Sign, you may also have the tendency to vent. Doing this safely, by writing emails you never send, writing in a journal, talking to a trusted confidante, or screaming into a pillow doesn't hurt anyone. Beware of talking too much - especially to the wrong people.
Learning how to manage your temper when it flares up means the difference between friends that can trust you and co-workers who dread confrontation. No need to be that person. Cool off before you explode, and you'll be a lot happier for it.