Don't forget... "AIRSHIP SLICE!!!" and "Bye space sword!"
Korra by my memory is pretty good. NOTHING compares to team Avatar, but you won't be dissapointed. I will say that the last moments of Korra... animated tv's best moment.
Korea had amazing villains and her avatar development was more character driven than Aang's.
Korra is very solid, but has issues that TLAB didn't. The story is more disjointed, it feels like it wasn't written as one full, cohesive story, but more as if it was just a "wing it" situation. Even through it has issues its still a very watchable and enjoyable show.