Yes, I understand your point of view, arcibalde. I'll try to explain better my point.
If Bob is a captain with suicidal tendencies he will usually (which means in the balanced stance) be very, very aggressive. If I, the admiral of the fleet, order him to keep a more conservative behaviour he will do what BOB thinks is a more conservative behaviour, so he may still be aggressive, but he will be forced to not put his ship in too much risk. He's NOT becoming cautious, he's just trying his best to restrain his tendency of ramming enemy ships while shooting every last bullet he has.
Every captain will obey your order of keeping a general behaviour, but each captain's personality will affect what is the final behaviour for his ship.
Let's make some examples of what i'm trying to say:
personality -> stance -> behaviourCautious -> defensive -> very cautious, he will avoid most ships, even weaker ones, and will try to keep his flux low to be faster.
Cautuous -> balanced -> keeps distance from bigger ships, avoiding them as much as possible, but fights with the other ones. Retreats if his flux reaches high levels or the enemy gets reinforcements.
Cautious -> aggressive -> he will try to engage enemy ships (even larger ones) for longer times, but he won't ever overextend looking for a kill and will retreat as soon as he takes some damage.
Suicidal -> defensive -> tries to kill his opponent, but retreats if his ships is being overwhelmed by the enemy.
Suicidal -> balanced -> retreats only if his ship is barely functional, but otherwise he will always charge into battle.
Suicidal -> aggressive -> never retreats and will fight to the death (his, probably).
As you see, combining different stances with different personalities makes quite a difference in the end.
Still, in the end it could be not worth it, but i'm throwing this idea to the forum exacly to see that.