Chang. Unless he was a complete moron, he knew the Klingon Empire was in trouble and probably wouldn't survive unless peace was made.
That's far from said. Supposedly, the Empire
was saved from the Praxis fallout once the Feds stopped shooting at them. Chang could certainly have achieved the "Feds stop shooting" part by destroying the Federation.
But he loved war so much and couldn't stand the idea of his life without it. So everything he did was for his own personal benefit and not that of the Empire.
Which is quite plausible a motivation as far as humans go; Klingons shouldn't stray
too far from the human mold if they're to be relatable still.
Then who did? He stood to benefit the most: he got Gorkon killed, he almost got the war he wanted, and he held a solid position as the de facto leader of that war. Plus, his side
needed that war, not just for Klingon entertainment, but because that was key to their continuing survival. It seems the deal was the sweetest for him, less so for Cartwright's side.
Which of course may prove that Cartwright and his cunning Vulcan strategists masterminded it all, and made the deal so sweet to convince even an arch-enemy to join.
Although personally I think the Romulans suckered both into it, while making it look as if one of their victims suckered the other.
That, I think, is what you have to do when your ship is an assassin's Derringer, specifically built to give a love pat to a battle cruiser so that your assassins can do their dirty work inside. Chang's torps were duds, mere copies of low-level Federation warheads (the conspiracy required them to be convincing copies of such), so when going after a "victim" who toted a regular assault rifle, he had to be careful...
...And he had to hide from Kirk the fact that he only packed a Derringer against Kirk's AK-47. So he pretended to be a mad sadist, "taking his time", when in fact he was doing his very worst and it still wasn't enough. See his torps actually score hits - they do basically no damage at all!
...Which sort of improves his standing in the guts department, too.
Shows no bravery whatsoever.
Well, apparently he stands on the bridge of a battle cruiser at which photon torpedoes are being fired on his very own command... Solely in order to make his charade more convincing!
Chang's courage is of the strategic sort. He doesn't put himself on the line of fire foolishly, for sheer vanity, but out of ideological necessity.
Finally I know Chang saying Shakespeare was supposed to mimic Khan quoting Moby Dick, but really didn't make much sense.
Hmm. Chang abducting Shakespeare for the Klingons sounds sorta cute, but Khan knowing Klingon proverbs is the part that makes no sense. Khan has never met a Klingon, and the library he has down on Ceti Alpha V is his own, not a 23rd century one expanded with Klingon Klassics.
Timo Saloniemi