Each of the class stories started from a single core idea; the Knight, for example, came from the idea that the Knight would have to face the full might of the dark side alone, while the Consular was seen as a Jedi facing threats that couldn’t simply be seen and fought. It’s an interesting look at the ideas that ultimately turned into the stories you can now play in the game, and a neat retrospective now that all classes are firmly entrenched in a struggle against the Eternal Empire.
Knights of the Fallen Empire storyline means that the player characters of Star Wars: The Old Republic have come a long way from their original class stories. But what inspired those stories? What inspired their creation? The official Star Wars site is running articles about the creation of the class stories and the goal of the team behind these stories, starting with the four Republic classes: Jedi Knight, Jedi Consular, Trooper, and Smuggler.
Source: Official Star Wars site