You have a lot of freedom to make choices in the game (not total freedom, but freedom enough), and you can have a lot of fun doing it too.
I would give an example, but that would be spoiling too much. Making these choices will change not only your personality and traits, but also how events in the game will play out. If you make good choices (such as saving the lives of others, or helping the needy), then you follow the path of the Jedi, but if you make bad choices (killing the needy, torturing people), then you go onto the Sith. This game also has multiple endings depending on your choices in the game. Meanwhile, the game's main villain Darth Malek is looking for an ultimate weapon to power his Sith fleet. It turns out he is very sensitive in the force, and has the skills of a Jedi. The story follows your character who has no memory of his life, and goes out to find out. I love how it tells the story of what happened before any of the movies ever took place.
This game is one of my all-time favorite Star Wars games. This review contains spoilers, click expand to view.