I would be a Genderbender.
There are not a lot of Genderbenders around anymore. Their art in bending the laws of gender is so exquisite, and so unique. Unfortuantely, I am one of the last Genderbenders. I must traverse the land looking for ancient relics left behind my kind in order to restore our form of bending. It's not looking so well. People who bend differently than us have stolen our relics. It has been a great shame that I must fight to the death with these people, seeing as how this simply could have been prevented.
Genderbenders are very eccentric people. We love having people guess what gender we are, and then laugh as they fail to see the real truth. There is no such thing as gender for us. We love to engage ourselves in polygamy, we are never satisfied with just one mate. Along with that, we are very talkative people. We talk non-stop and don't shut up unless it's the right time. Genderbenders get along with every type of bender. We never discriminate, and we hope you do not discriminate against us.
Just like Bloodbending, Genderbending is not required for the Avatar to learn, but it is very can be very useful if they decide to learn it. To be honest, we are not sure the Avatar can learn it at all, considering it's almost a lost art. Ancient Monks who have mastered Genderbending have tried with all their might to teach previous Avatars this form of bending, but every attempt has failed. We believed for many years that the Avatar themselves had no gender, but apparently we are wrong. ALL GENDERBENDERS ARE GENDERLESS!
Wait--This is for Korra and AtLA? Oh...... Well in that case, I guess I would be a Firebender. Although I would love to be an Airbender, I fit the characteristics as a Firebender better.
Oh wow..... That was really worthless, Genderbending 5ever!