^^ pretty good summary.
But I do think that Disciple suffers also from being waaaay too emo on top of that, and too obsessed with the whole jedi thing. I mean instead of being some perverted weirdo he can utilize his skills and become a much better person for the republic he cares so much about (or so he says) Though I do think that the annoying parts of his character may be blamed on the fact that parts of his storyline is cut, even though he is probably designed to be the "shorter end of the stick" for atton from start,
Same thing can be said about Brianna to a certain degree regarding her lack of inner self content in game.
Oh, HK47 is indeed a good role model if you can appreciate his mentality. He is THE most professional assassain., and its not just skillz I am talking about.