Furrin_Gok said:
That's a useless definition. If you want Stan's own Superman, search for stan_lee superman. Original_character is too frequently used for the latter case, "I made this character for someone else's world, but the character is mine."

I used Superman to explain what I define an original character as. Obviously, for a character as famous as Superman, you’d be better off just searching for/tagging as Superman.

The example you gave, of people using “original_character” for their own character who is a part of someone else’s world, would be better tagged as “fan_character,” but that doesn’t make the “original_character” tag useless or invalid.