Hi Vogor,
Your level of detail in most of these images is really good but like a few have said before, I too think they fall on the dark side (accidental Star Wars reference) of where they could/should be. To remedy this, i'm wondering if it's not worth introducing some artificial light into the scenes? Turn you lamps on and some overhead lighting too and i think your end result will be MUCH more engaging. Keep up the good work!