If you are looking to be evil, abuse T3 at every opportunity. This will usually entail choosing the lighter side of a conversation. Influence Keeping T3 on your side involves speaking kindly to him. Droids are useful for ranged combat and immunity to force powers.
T3-M4 Expert Droid If you choose to play the prologue (or have played the first game) you will become famliar with T3 quickly. When you recieve your personalized lightsaber crystal in the Crystal Caves of Dantooine, speak with Kreia and she will center the crystal on your alignment and make it more powerful. At this point she will give you access to the addition classes that come with being evil or good. Be sure to speak to Kreia once you have reached level 15 and have a very strong alignment in either direction. Influence Kreia can be a difficult character to read but there is one thing that will always please her: manipulation. This means that she works well as a ranged character and should be equipped with a blaster rifle or pistol. Her most powerful attribute is her ability to wield the force. She doesn't join you at first, but immediately enters your mind to provide advice throughout the journey. Kreia Jedi Consolur Kriea is the first person you will encounter in the game.