Watch distortion and perspective, the lines on those are really unsettling to look at. Look into architecture photography and get yourself a lens that either doesn't give so much distortion or, preferably, has movements to correct for it (I know Canon makes a couple T/S lenses). Vertical lines should be parallel or the space will either open up to oblivion or be claustrophobic and sickening.
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boom and blaow... well said. A wide angle tilt-shift would be perfect to correct these problems. Also, a more specific note: on the shot of the kid's bedroom why have you left the desk lamp on to blow out completely? Its cooler light temp and complete overexposure really detracts from the shot. It's the little things that really help with shots like these, everything has to be just so.