I often evaluate a room and it's function and aesthetic by making sure there is something visual and or functional in every quadrant of a room. An important function of each "quarter" is lighting. There should be adequate lighting in all four sectors, be it overhead, task, or ambient light.
This room, by one of my favorite designers S. Russell Groves, is a great example of ample lighting. There is literally a lamp in each quadrant plus an overhead fixture. Overhead lighting is certainly "back" in fashion, and not only adds more lumens to a room but is also a key focal point, a sculptural quality on the ceiling which is often a blank forgotten space. Here is the other side of Groves room design:
I hope this tip helps you to analyze your lighting needs in your space. Is there adequate lighting in each quarter of your room?