I've been pondering the "trifecta" dynamic between Kirk, Spock, and McCoy, the way all of their personalities play so well into each other, and the way Kirk just wouldn't be Kirk without drawing from the alternate perspectives of both Spock and Bones. I'm trying to boil it down to primary defining characteristics, in the same way that red, blue and green are primary colors on the color wheel. For Spock, the primary defining characteristic is obviously logic. For McCoy, I would say passion. But what is the primary defining characteristic for Kirk, that is distinct from those two and complements them so well? My first thought was boldness, but that's kinda along the same lines as passion. My second thought was wisdom (as in, the wisdom to know which one to listen to at any given time), but that seems too similar to logic. Maybe discernment, but that seems a bit too passive for a man of action like Kirk. Anyone else want to brainstorm for the best term that describes the primary defining characteristic which makes Kirk's relationship with Spock and McCoy so complementary?