My Gray Bounty Hunter, Xarl, uses the Fett Code of Honor and is motivated by love of being a Bounty Hunter. He kills his targets if requested, and anyone who tries to stop him, but doesn't kill bystanders or those he hasn't been hired to kill. He never betrays a client and will not be swayed by any offers of rewards or begging or bribes to cease a hunt or to spare a target. He respects the Empire because it brings order and stability, whereas the Republic is rife with corruption and weakness, but he dislikes the excesses of the Sith (and after the story the Jedi as well). He is a Mandalorian and proud to be one, regarding them as the greatest culture in the galaxy for embodying everything he respects.
My LS Sith Sorc, Taldeer, is motivated by dislike of the Republic's corruption, the Jedi's arrogance and vendetta against the Empire, and by the desire to bring order to the galaxy. She dislikes the wanton cruelty and short-sighted views of many Sith like Thana Vesh as it brings nothing but personal pleasure to them at great cost to others. She intends to win the war against the Republic so that the Empire and the Sith people will not face extinction, and then to reorganize the Sith into a more temperant and pragmatic order. She does not forgive traitors though, and kills them without remorse.