ummm .. personally I like it a lot. I don't know if it's just me but I actually like some vignette in certain shots. What do others think? Of course it should not be overdone but I think adding some strategically can enhance a photo's feel.
The most important though is what you
think of it as the shot is your creation and vision.
Also, you know, I have a simple trick to do vignette with PS. I usually choose the center of the picture on a new transparent layer and then add a radial gradient going from transparent to black (from center outwards) and then adjust the layer's opacity to control the intensity of the effect. Might be easier and smoother.
P.S. I like the "rule of thirds" too