It does seem to be the norm these days for BB to put in x number of HM's and then only air the few that are obnoxious, get their bits out or start a showmance.
I don't know why they bother putting more normal people in, as we never get to see them and I am sure their conversations are more interesting. Indeed in the past when so called boring HM's have been spoken about by other Hms they say what great fun they are but classing someone boring because we aren't getting to see them is not fair.
Also when it is a vote to save, these people will go first as nobody is going to vote for someone they never get to see