Sokka was clearly very loyal to his friends, family, and allies. Many times over he had helped them when he could and when he was needed. However, Sokka also seemed to realize the importance —and sometimes necessity— of one having to fight their own battles. When Master Piandao attacked Sokka, Aang, Katara, and Toph rushed in to help Sokka, but he told his friends to stay back as it was his battle to fight alone. He had to prove himself as a swordsman, although it turned out Piandao simply attacked his pupil just to test him. Later, he held a similar view during Aang's battle with Ozai when Sozin's Comet arrived. When Suki suggested she, Toph, and Sokka should help Aang, Sokka pointed out that "the Fire Lord is Aang's fight." He understood it was Aang's destiny to face Ozai alone, while he, Suki, and Toph focused their energies on stopping the Fire Nation airship fleet.
Sokka was the critical thinker of Team Avatar and was the one who devised the group's agenda.
Added by Renatabls
Patriotic and long to hold a grudge, he strongly desired and eventually meted out vengeance for the Fire Nation's decimation of the Water Tribe and the death of his mother. He held little interest in the mysticism surrounding bending and preferred to solve problems using his strength and his wits. He tended to be rash, however, and his pride often lead to embarrassment. When Sokka had been humiliated, his versatility made for a heartfelt apology and changing of his ways. A good example of this is when he apologized to Suki and the Kyoshi Warriors for saying that boys were better than girls.
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