Ever since Bionicle was released, this has been a point of contention amoung fans. Many people were upset when they realized that the only "blue guys" are girls, and now their fantasies of being female Le-Matoran are shattered. But, I would like to argue, not against it, but for it. In my opion, the genderlock added something unique to the Bionicle universe. Now, I will agree, it was very poorly carried out, and I would have loved to see more all female elements crop up instead of the three canon ones we were given, and overall, more frmale chracters would have been much appreciated. But here's the thing, it makes sense in the context of the Matoran Universe. When Mata-Nui was built, none of the Matoran had sentience. They were simple robots required to carry out a task. Once they gained sentience, their "personalities" would have been given to them based on the roles they were to take, so a Ga-Matoran, who's job required a level head and focus, would have gained classically female traits. They would then be labeled as female, and even Matoran that didnt bear these traits would have been labeled as such. Not to mention, when we got characters that didn't fit into a stereotype, such as Helrix, they became extremely memorable. And now as to the subject of fan created characters. This is what most of the contention around this subject has affected, people making their own characters, and then thinking, hey, why can't my red character be a girl? And what say is, why can't they? Your characters aren't canon, so why follow it? But then when you, say, join a role play that includes genderlocking, that is up the whoever created it to decide how canonical it would be. Really it shouldn't matter as far as fan creations go, but when it comes to the lore, my vote is for it, as opposed to against it.