Sokka x Azula
I don't see where people get this one, but I'll go for it. Normally this pairing would be really long because it is quite complicated.
Azula grinned as the helpless avatar crew squirmed against their bindings. There was no way for them to escape, all of their bending had been disabled and Toph and Aang were locked in anti earthbending cages. I'm the only one who can get us out of this situation, Sokka thought. He managed to loose his bindings enough to use his boomerang to cut them, in the process leaving a long gash along his arm. He threw his boomerang which hit Mai in the head knocking her out. It came around back and hit Ty Lee repeating the process. They both toppled over.
Azula put her fist to Katara's head threateningly. Sokka kept running at her. Azula frowned and then hit Katara in the head hard enough to knock her out. Katara of course didn't fall over, still being bound. Sokka stopped in front of her and she went in for the awaited and plotted over kiss. Sokka went with it then pulled away after a second. Sokka came back holding the key to Toph and Aang's mini prison. It was worth it.
No one would ever know.
A/N: Wow complicated. Sokka is in 5 of these stories already lol. He's the official player of the avatar world.