Composition is good, lighting works, few technical issues with geometry of mat and floor board. Post production as stated by others the bloom effect layer could be dialed back a bit.
I too sometimes use photo techniques to enhance the render in post production, we all do for that matter, however each have adopted a style that works for them. In some case it's adding Chromatic Aberration to give your render an bad photo look.
Most phots want to get rid of the effect, we welcome the effect in 3D rendering, because it dulls the "Perfect Image" look.
http://digital-photography-school.com/h ... -photoshop
Dont fix it, do the opposite to add it or use tools to add the effect. There is a plugin for GIMP also.