Aries are recognized for their spontaneity, independence and bravery. They're the individuals who take adventures to the great unknown and are often known as the leaders in their communities. At the same time however, Aries, like all Zodiac signs, have their downsides as well, from being impulsive to a bit egotistical. Of course they're aware of these flaws, but if you're friends with someone whose birthday falls between March 21 and April 20, know these things you should never say to an Aries.