Awesome story that has multible endings; light/dark side endings.
Very memorable characters, very good combat system.
Good Moral choices; choose to help people in trouble with bounty hunters/ect, help the man/woman in trouble, accept bribe and walk away, or help then demand payment, dark side/light side actions, let people go or kill them, etc.
Every decision you make affects the story and how the characters/world act and talk to you; light/dark side choices, killing off companions, choosing to help people or not changes things, etc.
Great level up system; can choose between many force powers, and melee or ranged weapon atacks/passives, many stats to upgrade, etc.
Very interactive companions; you get many companions as you play, what you do affects how they act and talk to you, some things you do before can affect if you even get some of them, you can talk to them and learn their history, and develop a mild romantic relationship with some of them, they fight and argue amongst themselves, etc.
Good variety of weapons; rifles, pistols (can duel wield), swords (can duel wield), duel-blade swords, lightsabers (can duel wield), double-blades lightsabers, gernades, mines.
Only complaint is the companions walk rather close to you at times and can trap you in a doorway, corner of a hallway, etc.