I have done this both ways. When I cooked the meat side down, I created a bed of brown sugar and honey for it to lay in. Ribs were very good. The next time that I did this, I switched and cooked the ribs bone side down and sprinkled them with brown sugar and honey. My wife preferred this way better since the meat was falling off of the bone. They were extremely tasty and juicy this way.
So, this is what she likes and that is what we are going to try to achieve.
Ed