Don't get me wrong. I love Battlestar: Galactica. But they have Sagittarians all wrong. Both my fiance and my older brother are Sagittarians, and they would be the first to tell you that refusing perfectly good medicine when you need it is ill-advised. Actually, they wouldn't say that. They would come right out and tell you to your face that you're stupid.
Sagittarians are known for being brutally honest. If you want to hear a certain answer, don't ask a Sagittarius the question. They find little white lies repugnant. That is the dark side of a Sagittarius, along with being ludicrously protective of their independence. My brother walked at ten months, which is pretty impressive, but my fiance crawled at four months and walked at nine months. I'm sure it's because they felt being carried about cramped their style and limited their exploration.
What is so beautiful about Sagittarius is its vibrant intellect. Out of all the fire signs, Sagittarius is the most philosophical. While Aries and Leo are symbolized by the Ram and the Lion, respectively, Sagittarius is the Centaur, or the Archer. Their animal magnetism (at least my fiance's, I'm not going to go there about my brother) and fiery physicality is balanced by an innate love of the abstract. They are curious and love adventure. Sagittarius, in this sense, is the bridge from the element of Fire to its natural companion, intellectual Air. There's a reason why Captain Planet put those two Planeteers together. It's science. Air feeds Fire. In Sagittarius you get the best of both--elements, not Planeteers.
Sagittarius shows its fire in any competition. The Sagittarius wants to be the best, but while Leo tends to go for the gold in theatrics and socializing, and Aries in sports and physical bravado, the Sagittarius wants to be the top of the class--and this includes gym and theater. When a Sagittarius is motivated, it's best to just step back and watch. You'll thrill at how much they accomplish, and the diversity of their interests. One Sag I know changed has changed his majors several times. Sagittarius, in balance, can love learning for its own sake, and not just to gain accolades.
With this competition, however, comes an obsessive need to be right. A Sagittarius will break hearts and balls over an idea. They're like Artemis, who, after catching Actaeon looking at her while she was bathing, turned him into a stag to be ripped apart by his own dogs. Artemis took the idea of virginity so seriously that she was willing to kill over the tiniest insult to it. In fact, if she found out that one of her nymphs had slept with a man, even through rape, she would kill her. This is the darkest side of Sagittarius.
That said, Sagittarius is charming, even with the bluntness. Sagittarius is a quick wit, and, because they love to travel and explore, always have something interesting to say. Also, since Sagittarius is ruled by Jupiter, the planet of luck and expansion, they have an attractive quality, a charisma. And, although it is hard for a Sagittarian to fall in love (except with independence, the feel of their feet moving along a road, and learning itself), once it happens, there is no love truer. I know this from personal experience.
Archetypes, people, and objects associated with Sagittarius:
Artemis, the Greek Archer goddess of the Moon, known as Diana to the Romans. Although you've probably heard of her, there's many things about her you might not know, such as she helped her mother give birth to her twin brother, Apollo: really detailed biography of Artemis.
Horses--animals known for movement and power
Taliesin, the Welsh hero, who started out as a little boy named Gwion Bach, who ate a potion he shouldn't have, and, to make a long story short, turned himself into a piece of corn and was eaten by his witch foster mother. She ended up giving birth to him nine months later. At birth, Taliesin speaks like a Rhodes scholar, and so is named Taliesin, or "bright brow," referring to his intelligence and precocity, something Sagittarians are known for. He also travels the world and has many adventures, as Sagittarians do, all in search of truth. And, the cool part is, he's based on a real guy! You can read more about him here: http://www.pantheon.org/articles/t/taliesin.html
Vainamoinen, the Finnish hero, whose magical voice created, manipulated, and destroyed, and whom Gandalf was modeled after. His end was brought by his hubris. Sagittarian tongues can also be balms or scalpels, and must take care not to become to arrogant. Read more about him here: http://en.wikipedia.org/wiki/Väinämöinen