This is an interesting set of photographs. I like #4 one the most. You might also consider making a B&W version of that one. Numbers 2 and 3 would have benefited from a shallow depth of field to isolate the foreground subject. The focus is too deep for those shots. Also, in #2 I think your angle was too low--the table isn't very interesting--and you cropped a little too tight at the top.
Unfortunately the depth of field was more difficult to control on the third one as it was a small sensor (Canon S90, handheld).
On the second one I had to hold the camera on the table as the light was not that abundant, and the combination with a wide angle lens didn't allow me too much room to compose (or too shallow DOF)
Here is a bw version of it, plus few more experimental versions where I played only with the WB or the tint (in the last one)