What your handwriting means. If letters slant to the left: Indicates introspection and a lot of emotional control. If letter slant to the right: Reveals a person whoâs outgoing, friendly, impulsive, and emotionally open. If letters are straight up and down: The sign of someone whoâs ruled by the head, not the heart.Letters that slant in more than one direction: Indicates versatility and adaptability.An erratic slant: Usually means a lack of flexibility.f letters are straight up and down: The sign of someone whoâs ruled by the head, not the heart. Letters that slant in more than one direction: Indicates versatility and adaptability. An erratic slant: Usually means a lack of flexibility.