Ok man after that dumbass , "It was late in the evening, i couldn't see my model anymore 'cause my girlfriend was angry at me for getting out of bed in the middle of the night to do some more maya, and threw stuff at me"-excuse, i'm going to be tough on you:p .

There are a couple of things i think;
first of all; i like the rusty pipe.
second;
The framework/window and the frontdoor , will look a lot nicer, i think , when they fall inside the wall (if you don't know what i mean i will make a quick sketch for you )
And last;
I'm going to bitch about the corner stone again
I think that you should lower the vein width or remove the texture from the colorinput and put in the bump-input, and then add as i earlier suggested a fractal or something like that to the specular input