In Tokyo Ghoul, each ghoul is provided a mask to hide their identity from the CCG. And although I've yet to watch the entire series (currently on season 2), it appears that ghouls always wear the same mask. Doesn't this cause a major disadvantage during battle?
If a ghoul wears the same mask all the time, then upon first look, an opponent will know the capabilities of the ghoul, should the ghoul have been encountered before. But, if different masks were worn, and/or traded around, this would provide uncertainty when beginning a fight, and would be much more advantageous for ghouls.
So, is there any particular reason a ghoul will wear only one mask?