The ending to LoK was too much for me. I'm still hoping another series happens because that ending, while nice, was not good for ending the avatar series. A part of me hopes the next avatar would be during wartime but the next time period I'd guess would be modern and I'm not sure how it would work. Honestly I just want to see an avatar during a turbulent time in the world.
Uhm...Aang was during a war? Or...I guess, the end of it.
Korra fought a war in season 4. And a small war in season 1.
They're both turbulent times. Korra had 3 catastrophes and an anti-bender terrorist group to deal with, which was a little retarded...but whatever. Still cool.
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And the ending, while not terrible, nor fantastic, is the ending. I don't want it to end that way, but I don't want it to drag on into nonsense...