Aang is a kid who grew up among the Air Nomads, a tribe of monks who had achieved redemption in spiritual actualization. He faces three big challenges: Coming to peace with the fact that he is the Avatar, that he ‘failed’ a 100 years ago, preparing to fight the Fire Lord Ozai. His demeanor is calm and composed, ever the pacifist. The world around him needs him as an Avatar, and places heavy demands on him. Korra, on the other hand, is a water tribe girl in her late teens who always wanted to be the Avatar, shows much more willingness to act and kick some butt than Aang. She lives in a world that tells her it doesn’t need the Avatar anymore, and she has to establish her importance over and over.
The story of ATLA revolves around one bad guy for three seasons. This gives the creators ample time to insert so-called ‘filler episodes’ where we get to learn more about the characters’ pasts, the world’s history and the mechanics of bending, among others. LOK was originally meant to be a mini series, and thus every season Korra deals with a new baddie and a new challenge. This changes the pace of story-telling significantly, as fewer, if any filler episodes can be employed for us to learn about the characters. It’s harder to like the characters if we don’t really get to know them.
The Hero of Time is undoubtedly among the most impressive Links out there in terms of sheer power goes. With the golden gauntlets he can lift over quite a lot of tons. He has the Ocarina of Time which can literally rewind time, fast forward it, go to different locations in a mere instant. Pretty much this Link is filled with hax.
Not to mention the masks; turning you into a giant [pretty self explanatory], forming into a Zora which you can go through underwater, form into a Goron which can be beneficial for bulldozing enemies and picking up things that normal Link couldn’t have. And of course the most powerful item of the Hero of Time.