I've been on a bit of an Avatar kick lately
And I know this concept has been done a LOT, but I couldn't resist. So, here is my interpretation of what Aang might look like several years post-series. I had a lot of fun drawing older!Aang, especially with a serious look on his face. Of course, I still love it when he's smiling and whatnot (he's so adorable!^-^) Also, I thought it would look cool to put the symbols/characters for the four bending elements behind him...
I came up with the pose after looking for X/1999 (a manga) artwork on google and came across this [link]
picture of Subaru Sumeragi and could not stop thinking, "Oh my gosh, it's grown-up Aang with hair!" (of course, one could also argue that Subaru resembles Zuko, but oh well). I just HAD to draw Aang in that pose.
Medium: watercolor, markers, ink, colored pencils
Disclaimer: I don't own Avatar