Things I like: I love the (positive feel of the) use of negative space here! I love the simplicity of the composition. I like the cool tones of the subject itself. I like many of the compositional elements of the shot.
Things I don't like: There are some strange lines in the vase itself that I think kind of detract from the otherwise simple feel of this shot. I think (but have never tried to shoot this type of subject) that if you chose an ever so slightly different angle that these would go away or become more interesting (one or the other.) This subject doesn't hold a great deal of interest for me so while I find it a very cool subject for study (I'm gonna try and find a similar object to study myself...), it doesn't really have staying power IMHO.
TC
Technical: Most all images submitted fit the challenge. Exposure composition focus lighting good, I like the color.
Personal: My initial response is that the camera was knocked to the left right when the shutter opened :-) Other than a little less traditional composition, I'm not sure the placement lends any interest or adds to the idea of simplicity.