The Legend of Korra - Book 2: Spirits

Oh wow. I've just watched episode 10-14 in a row. That was good.

 Spoiler

Though I did not like the ending. I was assuming Vaatu would win, and the next two seasons would be focussing the story afterwards. Instead Korra saves the day in a matter of minutes. It suprised me, but I think I would've prefered the other option.
And like others stated; the heck was going on with Jinora?

Noting the post above made me think. The combination of all air nomads being wiped out during the Aang era and Korra losing the connection to her past lives. Imagine how weak the general ability to airbend would be now. Much knowledge is probably lost.