1. Wrong furniture size. The scale of the dining table should be proportional to the size of the room, not too big nor too small. 2. Small area rug Ideally, the rug size should be big enough to accommodate the dining table plus the chairs comfortably. 3. Wrong table shape If the room is rectangular in shape, source for an oval or rectangular shaped table. If the room is square, get a square or a round dining table. 4. Wrong lighting fixture Rectangular/oval tables look best with a linear or horizontal light fixture above. The idea is to span light across the table. Lantern light...