Gina may cause arguments which some find liven up the house, personally I don't, but every single thing she does is about herself, she is self obsessed and not an interesting person. To be consistently interesting you need to have more than one facet to your personality, as much as I don't particularly like Sallie she at least is a little less one dimensional than either Dexter to Gina wouldn't want Sallie to win but she will make the house more interesting than either of the other two. So how dull would be the house be if Gina left? No duller than it is now.