I like the concept. However I have to wonder if HDR is the best way to process these. They have almost a plastic feeling to them and I think it's probably the result of too much HDR.
I kind of like if the 3D effect if it was only applied to the graffiti and not the whole image -
is this a bracketed shot (HDR) or just run through tone mapping?
For me it's a little over-cooked and lacks depth - personally i'd go for a more gritty style and make use of light and shadow more and may be lose the blue cast.
I think you have many better images in your gallery than these imho