AANG AND KATARA ARE SOULMATES! YOU'RE DELUDED IF YOU THINK THEY MARRIED FOR ANY OTHER REASON THAN TRUE LOVE; ZUKO HAD FAR MORE CHEMISTRY WITH KATARA THAN AANG! KATAANG IS CANON! IRRELEVANT! AANG LITERALLY LET GO HIS EARTHLY TETHER WITH KATARA TO MASTER THE AVATAR STATE, WHILE ZUKO WAS WILLING TO DIE TAKING AZULA'S LIGHTNING FOR KATARA! AANG IS THE AVATAR AND HAS GREATER RESPONSIBLITIES THAN EVERYONE ELSE COMBINED! AND ZUKO WAS ALREADY A GOOD GUY BY THAT POINT, HE WOULD'VE DONE THAT FOR ANYONE!