Find a style of Handles or Knobs that Add the "special" look and feel to the room.........Ya can't get much cheaper or easier than that...........Depending on the door design you could place the handles "North/South" or "East/West".........Wire pulls look simple good.......Add some color........Check the home/store displays
TIP: make a template (cardboard) to get the placement the same on all the doors..........
Add some Crown moulding around the top of the cabinet boxes.........