HK-47 from KOTOR.
"Indeed, I am most eager to engage in some unadulterated violence. At your command, of course, master."
"Translation: He requires proof of good faith. We must make a contribution to his people that shows we are not a threat. Shall I blast him now, master?"
HK-47: "Query: Would you rather be caught with contraband that is 'very' illegal, or just a little illegal?"
Revan: "What's the difference?"
HK-47: "About twenty years, master."
"Advisory: It is not possible to destroy the master. It is suggested that you run while my blaster warms up, meatbags."
"I would have congratulated him, if he had not been sizzling and incoherent at the time. If you will excuse me, I will meditate on the face of my old master as he was being electrocuted. I find it most soothing."
"Observation: I am a droid, master, with programming. Even if I did not enjoy killing, I would have no choice. Thankfully, I enjoy it very much."