Sad story for Amon. What an awesome character. I hope we see him again.
This series was incredible. What they did in 12 episodes is amazing. To make me care about the characters almost as much as I did the last series after three seasons is pretty hard thing to accomplish. Now there were some blemishes, and they mainly have to do with Mako, but in return we were introduced to fart bending.
I don't mind that everything was neatly wrapped up. It'll make the wait for season 2 that much easier. And though a bit rushed, I still thought the ending was very powerful and moving. I just wish Aang had more lines. Actually, I wish Aang had more lines and took Korra away into the spirit world with Appa. I wanted the Avatar Spirit to be introduced and explained again, mainly because of how well they explained it last time. But that's a minor gripe. But speaking of minor gripes, what a tease it was to see Bumi. I mean, I'd rather see him then not see him, but that was lame.
Everything other than character development and writing was way better than the previous series. It had a better villian, better animation, better fight scenes, better intensity; it really showed how talented these individuals are. It makes me sad to remember how badly M. Night fucked it all up.