Just what did Julianne or Kimberly see in Michael?

Michael, as played by Dermot Mulroney, seemed a rather dull guy, so slow on the uptake that he didn't know Julianne loved him or pick up that she was trying to undermine his wedding plans. His job was rather dull and required too much travelling for settling down. The billionaire Wallace family would have had a social world that would be awfully challenging for him. Of course his character wasn't developed in a way for us to see his better qualities, but as much as we did see, he doesn't seem to have many.