My partner loves House Hunters. We usually correctly guess what the buyers will pick, and when they choose a different one we exclaim how stupid they are.
It's not so much what WE would want or think is the best deal, but what we judge those particular people will choose. If dtx1's "spoiler" is correct, that may explain why we can predict these people so well.
But the show format can be annoying to me, too much recycling of previous scenes and "recapping." If they've got 30 minutes to fill I think they should do it with more original & informative footage. Or maybe expand the choices to 4, which is more real-world anyway. Though admittedly, the attention span of most American audiences would probably not be able to keep track of that many homes.
My partner also likes all kinds of home improvement TV shows, and drags me to all the Home Shows at the Convention Center. God forbid I suggest we should attend a car or motorcycle show there, though.