I haven't seen the Enneagram before either. My highest was Type Four, but only by one point and types Seven and Nine were tied:
The Individualist. The introspective, romantic type. Fours are self-aware, sensitive, and reserved. They are emotionally honest, creative, and personal, but can also be moody and self-conscious. Withholding themselves from others due to feeling vulnerable and defective, they can also feel disdainful and exempt from ordinary ways of living. They typically have problems with melancholy, self-indulgence, and self-pity. At their Best: inspired and highly creative, they are able to renew themselves and transform their experiences.
The Enthusiast. The busy, productive type. Sevens are extroverted, optimistic, versatile, and spontaneous. Playful, high-spirited, and practical, they can also misapply their many talents, becoming overextended, scattered, and undisciplined. They constantly seek new and exciting experiences, but can become distracted and exhausted by staying on the go. They typically have problems with impatience and impulsiveness. At their Best: they focus their talents on worthwhile goals, becoming appreciative, joyous, and satisfied.
The Peacemaker. The easy-going, self-effacing type. Nines are accepting, trusting, and stable. They are usually creative, optimistic, and supportive, but can also be too willing to go along with others to keep the peace. They want everything to go smoothly and be without conflict, but they can also tend to be complacent, simplifying problems and minimizing anything upsetting. They typically have problems with inertia and stubbornness. At their Best: indomitable and all-embracing, they are able to bring people together and heal conflicts.