I think the ideal Sith would be unbound by any moral standards and would have the Sith efficiency and disregard for weak and Jedi calmness and focus. When I was playing my Sith characters I went by that mentality. I always chose conversation responses that had calmness, wit and mocking attitude. This makes you look like you always have things under control and that nothing can get to you. I never chose options that included anger. I enjoyed the most when Jedi opponent got angry and I would preach to him, make fun of him and tell him how pathetic he is. To me anger is not only a loser emotion but also makes one look unintelligent.
Just like i said. Your Sith has obviously trolling as a passion