http://youtube.com/watch?v=qEDlr2ccpxg Whaddya think?
We just know that the Nobodies of the five apprentices of Ansem are the founders of the Organisation XIII and that they are the first five members of it.What about the rest?How did they get in there?I think that all of them had to pass some skill and strength tests.All of them except for Roxas.Xemnas put Roxas into the organisation just because he was the Nobody of the Keyblade Master,so,that made him a Keyblade Master too.Of course that doesn't mean that Roxas isn't powerful.He would pass the tests for fun even if he had to do them.
Ok,I was having an argument with some guys about which one is cooler.My vote goes on Xemnas.I just like him more (and he's the leader of a whole organisation!!!!)