These are great! The first and 3rd images especially look like photos. What sort of lighting setup / exposure settings are you using for those images?
This is HDRI plus sun at .2 intensity. Exposure set to 0 and hilights to 5, but it is very sensetive and it strongly depends on the textures used also the postwork makes big differece. The render output was totaly gray sort of Nef/raw real camera output. So the point is the bright sun scenario is the trickiest there is XD
PS - Thanks for the high mark, it is a big shame for me that i can't share most of the works due to the conspiracy agreements.