DoF on the middle image is overdone.. but you probably know that :)
As for the overall impression.. they look nice, and realistic, but lack any atmosphere. I think people often do mistake of enabling as many light sources as possible. When there is just light, and no shadow, then scene ends up looking flat and completely without any mood. So in future, i would focus on specific light sources, and showing off their individual purpose, like how scene looks lit just by cove lights in the evening, or just by windows during sunny day. Enabling then all at once creates quite boring chaos IMHO :)
