Why dont they put all the questions on the home page?
Actually, it's the sensitive nature of the questions in health, and love & relationships. Those are the only two categoires that don't make the home page.
At some point, we'll probably start enabling language filters in those categories, too, as people ask about it regularly. Once we have something like that, then we may be able to put those on the home page.
I would assume it's because the homepage would be flooded with questions left and right. there are a lot of questions being frequently asked on this site.. if they put them all on the homepage nobody would be able to keep up.