Mmmmm......let's see now, Craigs bitchy application video suggested that he would be good for the show but in time honoured tradition he lied through his teeth to get on the show (his parents backed that up on BBLB tonight), it's no different to anyone else, they all do it.
Mary is more confrontational, Craig MAY become more entertaining as time goes on.
In time honoured tradition the public tend to vote out the bigger personalities first, leaving us with the lesser ones towards the end, which doesn't make great TV, so on that assumption I think Craig will stay but I would like to see Mary progress further.
So who knows which way it will go, it'll be close I think