I don't watch much TV, contrary to popular belief, however I do like to take a break to watch Avatar when I stumble across it:

Water. Earth. Fire. Air. 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 disappeared. Until now...

[ TV Shows on Nick.com ]

American made, Anime inspired, great story, original material, catch it if you can.