As far as fleshing out the Klingon culture, I'm much more satisfied with Mara's dialogue from Day of the Dove
, which basically was "We are hunters, captain", "There are poor planets in the Klingon systems. We must spread out in order to survive." It makes sense, in that they spend all of their money to build their military, so the people suffer. And presumably since the military expansion is to ensure survival, and this expansion is hurting people all the while...well, the irony of that is something which could have served the stories well, had the series continued.