Aang: When he first appeared in the iceberg (ep 1).

Korra: When she bent that sexy water in the introduction.

+ THE NEWS BUNDLE: 'The Legend of Korra' Voice Actress Reveals Season 3 Already in Production
While the new episodes are in the middle of color correction and the first two official images of the season released, there is still no word as to when The Legend of Korra Season 2 will air. Highly anticipated following an acclaimed first year and a sequel to an incredibly popular franchise, exactly how long we have until the Avatar gang is back on our small screen remains to be seen. But now it’s been revealed that with four total seasons already set, the wait following the second might not be as long.
I remember back in the Avatar days… the typical fanart we would get would be a charming, childish crayon drawing stuffed in an envelope. Nowadays on Korra, I take a skewed screenshot with my phone, post it, and shortly thereafter someone un-skews it, crops it, separates the character levels, clones the background, “Ken Burns” it with a multilevel slide, animates the characters blinking and talking, tints it, and makes a GIF out of it, that I then see on the same phone with which I took the original picture. Times they are a-changin’…
P.S. In case it is unclear, I’m not upset, I’m just amused and amazed.
EDIT: Wait, I got it! A more appropriate classification for this: not fan art, but a fan retake.