Nope never seen Legend of Korra. Definitely not....
/blatant lies
But I rather like the new season! There's a real theme of imperfection going on this time around with everyone really included in this. And the family dynamic that's being pursued with Aang's kids really has a lot of potential for interesting story telling.
On a more cautionary note: the main villain this season is interesting so far, but I'm slightly worried that they'll make him too straightforwardly power hungry as opposed to having more complex motivations. I think they'll avoid that trap but it's something that one of two things have made me mildly concerned about.