system
Given the following post, respond as if you're commenting on Reddit:
human
[Avatar: The Last Airbender] Why does Azula create blue flame?

Nearly every firebender creates 'normal-looking' orange fire, whereas when Azula firebends it is always blue.

I don't think it's particularly to do with power, as Ozai and Iroh appear to be more skilled at firebending and they firebend 'normal-looking' orange flames.
gpt
She practiced to produce blue flame.  Personal choice.  Blue fire is hotter than red fire (blue stars are hotter than red stars), but obviously takes up more energy.  It's indicative of Azula's personality.  She came to play.

*But really, they did it to distinguish Azula from Zuko.*