I love every single one of these. Thank you so much I will now implement these into my storyline.
I have a lot of Aang headcanons and I wanted to share them!
His birthday is the Spring Equinox, meaning he turns 13 sometime around the beginning of book 2
I know Air Nomads are associated with Fall, but I thought the season of life and rebirth fit Aang and his role as the avatar better
Modern Aang has autism diagnosis I'm not arguing about this
He's naturally charismatic. Not even in an 'oh he's hot' way, he's just got insane people skills. Katara "threw a cup of boiling hot tea into the lap of a respected FN general for being sexist and was promptly kicked out of the meeting" of the Water Tribe would like to take notes
Grandmas and kids love him immediately, even if they don't know he's the Avatar. With grandmas it's like 'oh he's such a nice young man :)' and with kids it's like 'you are the coolest person I've ever met can you adopt me'
He's a fantastic chef and loves cooking, and baking. Katara "everything I cook comes out slightly burnt or slightly undercooked no matter what I do" of the Water Tribe would, again, like to take notes
Air nomads are naturally flexible. Pair that with Aang's joint hypermobility and he makes for an excellent party trick
Monk Gyatso taught him his marble trick to stim. He used to motion of creating a ring of sorts to develop the air scooter, earning him his tattoos
He has an extremely high pain tolerance. Sokka "I hit my finger with my hammer and was incapacitated for a week" of the Water Tribe would, once again, like to take notes
I've heard some people headcanon that the 36th style of airbending that Aang didn't master was the movement Zhaheer used to kill the Earth Queen. I actually think that this technique was inspired by Aang's air scooter. Man's rolling in his damn grave
A crafter. His carving and painting skills are not the best, but the nuns taught him how to spin sky bison yarn, as well as techniques similar to crochet/knitting. Aang likes making these lovely warm blankets that everyone's always stealing from each other
Inventor of the fidget spinner, with help from Toph and Sokka. The original spinner was a device made of wire, holding three marbles with a fourth in the middle to hold between your fingers. Aang came up with the concept after Bumi II expressed disappointment that he couldn't do Aang's marble trick, Sokka designed it, and Toph metalbended it
Bumi and his new toy got so popular Aang had to start mass producing it. Cue a very desperate Aang on his knees begging Toph to help him
He gets really shaky and jumpy during storms. For. Reasons.
He's good at braiding hair. Kya and Katara always end up with braids because Aang's hands get away from him when he's cuddling with them
We see in The Storm that Aang was relatively popular with his peers. They admired him and played with him before he found out he was the Avatar, so I like to think he was very popular with little kids. Like, five year olds. They probably thought he was awesome.
Claustrophobic. I imagine being in a very tight space, especially one with little air, would freak him out
Can airbend with his ears. Don't ask.
We also see that he travels a lot - since he has friends from so many different nations. Building off another headcanon of mine that each individual nation had its own language, with a common language taught everywhere, Aang's probably polylingual.
He has this sort of otherworldly singing voice. It was relatively known in his childhood that air nomads are excellent singers - monks could make good money singing for people. Since he now lives in a time where air nomad songs haven't been heard for a while, he sounds almost otherworldly to them.
Bumi II, Kya II, and Tenzin all agree that bath time with Dad is so much more fun than bath time with mom. She doesn't even let them flood the bathroom >:(
On that note, Aang probably gushes about his kids any chance he gets. Frames their drawings in his office and everything.
Bumi II thinks his dad doesn't love him cause he's a nonbender? WRONG. Aang is currently writing a letter to Zuko about how amazing his son is and spirits, he's getting so good at spear fighting! I think being around Sokka is having that influence on him, oh and Kya-
He has this nice, loopy handwriting. It's not exactly cursive but it's similar.
He writes letters for Toph
He's very unaware of how famous he actually is, and it hits him like a truck when he realizes
"A museum? Zuko, don't you think that's a little much? It's not like anyone's gonna be interested haha" "Aang they made 16,000 gold pieces the first week"
KING of ridiculously censored swears. Monkeyfeathers, anyone? Absolutely says 'golly gee' in modern aus.
When he gets jealous, he gets more sad than angry. It's less "they're stealing my bestie!" and more "aw, Toph wants to hang out with them more than me :("
Also the king of puppy-cat eyes. Nobody except Toph can resist because come on, look at him! He only destroyed one building!
Airbending children can't really control their sneezes, so they often end up shooting themselves out of their cradles. Aang shot himself out a window once
He learns to control them by ~3 years old. His sneeze in the first episode was the little shit showing off
He is single-handedly responsible for 3/4th of the gray hairs at the Western Air Temple
Fire Lord Sozin destroyed many records and artifacts of Air Nomad history. Those left were preserved in a museum in Ba Sing Se. Aang and Katara have a date there, mostly taken up by Aang pissing himself over mislabeled artifacts
He finds a flute labled as a device used in fertility rituals and nearly chokes
That's all! Thanks for reading