It's very much grown on me. I sort of like the swiftness of it, which grantedly was literally accelerated for me by watching the first two ep.s with sound that had been ever-so-slightly sped up, like:

Sokka: Hey. Didyouknowyoujustjumpedliketenfeetintheair?
Aang: Oh? Huh. Feltmoreliketwenty.

Or later, ice-surfing on the backs of double-winged penguins:

Katara: Ihaven'tdonethissinceIwasakid!
Aang: You'restillakid!