4HeRo
If you have a ceiling in your scene (?)  you will be getting light from it, producting the odd looking hilights on the wall indentations. 
If it were me I would remove or reduce the bump to almost nothing.  Most wall coverings are almost flat... and if anything will be raised details.  Either that or your wall is ACTUALLY cracked... which is a disturbing thought.  
In any case, nice render, nice composition.. just generally nice work.
Another thought, that if everyone comments on something, the same thing, it means that THIS is what people are seeing, and in that circumstance the rest of the image is suffering.  Choose a different wall treatment and get feedback on that?  It may make the image stronger.
great work!
cheers