The bigest goof in the series is the opening.
When Katara says something like "Only the Avatar was the master of all four elements. Only he could stop the ruthless Fire Nation from conquering the world.
But when the world needed him most, he vannished. 100 years have passed and my brother and I decovered the new avatar..."Technically Aang isn't the new avatar, he is the same avatar that disapeared. Thats the biggest mistake.
I realized this a while ago, but was to lazy to try to memorize the quote
xd But finally I memorized it cause I have clips from show.
I would always cringed everytime I heard the mistake.
gonk I would yell at the TV saying "arjksdfguk! He's not the new avatar!!! He's the same person that pulled a Houdini you stupid people who wrote the dialog!" I donno, it really got on my nerves...the smallest things like that kinda set me off
domokun -----------
Also, just incase no one would look in "Storm(was it cool or what!!!)" thread
here:

If you wanna see my comment go to "Storm(was it cool or what!!!)" thread