Nice to see you've read it
But yes its just a theory. But I do think that there are different types of Sith, and I do believe that to be a Sith you have to be strong willed. Because your effectively doing battle with the Force.
And yes I agree, that Droid so killed them all. He mentions his skills include 'man-slaughter' *hint* *hint* that droid had a part in it. But I also agree that Sith often make rash and wasteful decisions as they often lack control of their emotions - killing enemies or in-subordinates, when they would have been more useful to them alive. Anger is useful, but only when focused and controlled.
<.< <.> >.>, ye
I prefer simple approach, depending on personality, some are focused because thats their personality trait, other enjoy to loose and lose themselves in emotions.
I dont know, after all, some private Bob is not much of a waste, well, some waste for sure