Just got back from a long roommate detour. Apologies for the late response. My all-time favorite manga is Gantz. Others in my top list are I Am a Hero (unfinished) and Noragami (also unfinished, but its got a great anime adaptation). I'm sure there are more, but off the top of my head, those are the good 'uns . Oh baby, as for Avatar and Korra, they're on a pedestal for me. In a way, I see them as my generation's growing up on the coattails/influences of Miyizaki seeing as he was a huge inspiration for the co-creators. Needless to say, if Gantz takes the cake for manga, AtLA and LoK take the cake for their class - since they aren't quite anime, but you catch my drift. As for how the continuation stacks up, I couldn't be more pleased. The author, Gene Yang, from what I've read, was a big fan of the original series. He was fortunate enough to collaborate with Bryke (the co-creator's joint, fan-made name - Bryan/Mike) throughout the processes to keep the feel of the stories integrous.