system
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human
[Legend of Korra] Why does Korra avoid using waterbending so much?

Why? She was trained by Katara, her father is an awesome waterbender, yet her go-to element to use is fire or earth.

It's pretty clear that whenever she uses water, her attacks are devastating, but she rarely if ever uses it, even in places like the South Pole, where water is in such abundance that the cities are built on it.

So what gives?
gpt
Even Avatars usually identify with one element. This is usually the element they have since birth. However Korra, despite being born a water bender, felt way more comfortable with fire and was a natural at it (Likely due to her brash, hotheaded nature). She uses Fire and Earth because that's where her personality and feelings often align. This is also why Air was such a problem for her and took so long for her to finally master, just like Earth and Fire were difficult for Aang.

Since each of the elements have an opposition, it's obvious she settles towards the fire/earth end of the spectrum were Aang settles more towards the air/water end.