I always say this when discussing All Stars but when you go back more than a couple of years the truth is when you're casting housemates from a decade ago you're not getting the housemates from a decade ago. People change in a decade - but the viewers haven't been on that journey with them so kind of expect them to be in the same mould. I think generally though if they are who they appeared to be first time around it can actually come across as fake and as the housemates playing up to their character - and viewers will see straight through that.
