I have to agree with lordjedi. Kirk disobeys orders all the time in the original series: in particular, he constantly breaks the prime directive. Any time a society acted in a way he disapproved, he got in the way. Spock would mention the Prime Directive or the Non-Interference Clause, and Kirk would pretty much say, "Screw that. This way of life sucks. I'm changing it!" Examples of this are "A Taste of Armageddon" and "The Apple." In "Amok Time," he disobeys a direct order to get Spock to Vulcan. Had T'Pau not pulled some strings, Kirk probably would have lost his command entirely. How convenient. In addition, he constantly lashed out and threatened with force as the very first option and even admitted that he was no diplomat on several occasions.