For those who don't know, a "clone" in a fighting game is a character who fights in a very similar (if not the same) manner as another character - it has nothing to do with looking the same.

What is the general opinion on it? I don't mind it too much when it's explained in the storyline (e.g. both characters trained at the same place or something), butI much prefer it when there are more unique characters to fight with. It makes the characters more unique.