From character development to world building, and the ability to bend its just wonderful , too bad its so called "sequel" didn't do well , so If they ruin avatar for me , I will be sad. Avatar Teaches us many things in out lives , its not just a kids show , it shows us the consequences of war , how people struggle to survive under the pressures of war , it is also about friendship, harmony , love , and acceptance, my favourite characters in the show (all the characters were also super great with much growth and maturity) are zuko and iroh. It shows a fatherly bond even though general iroh is his uncle. Love the show.