Scorpio (Oct. 23-Nov. 21)
Scorpios are incredibly protective and loyal, even dangerously so. They're not afraid to help friends out and they would do anything for the ones they love, and if you're a best friend, you get the benefits of that. Besides the fact that they can become overly argumentative, they have a real problem relinquishing control. Their desire to be in charge makes it hard for some friendships to survive unless everyone is understanding of Scorpio's ways.