Don't know what to say. This is amazing. Limited palette, sort of "crowned" by the reddish glare on the guy's bald spot, the subtle light and shadow still allowing the near prisonlike complex of grids their full force, and then the tiny bit of texture detail on the white tiles. Man going forth to darkness.
Both of your subway shots have a Hopper feel to me. Looking at the thumbs I could almost imagine they are painting. I love the angles and lines in this. Really very nice.
I like this. The yellow bricks do a very good job of leading to the person. The trash can on the wall and the man balance each other and both give the concept of being alone.