#s 1 & 3 aren't my flavor
1) content is dull
3) half building w/ tree branch? but again these aren't my flavor
#2 is nice. I like the exposure of it, I'd probably compose it in the center as the right side of the image (with DARK building in it) seems empty.
#4, Rather then BW, perhaps some sort of vintage filter would look nicer.
G'L