Not too sure whether I am competant to offer a full critique, but I can offer a few things which came to mind for me.
Wonderful image. Has this been croped at all? I would have loved a little more of the light pole. The curve at the top of the right doesn't have enough room to breathe, and the little box thing hanging down at the right is chopped off. The two boxy things either side, in their entirety, may have made a better composition complementing the two gentlemen,....but if that's all that was in the frame, can't do much about that.
I particularly like the shape of the lace wrought iron railing, lamp supports and the pattern on the man's shirt. The expression and the body shape of the gentleman on the left is interesting because it leads us to look where he is looking, which leaves us in a complete state of unknowingness about what he is looking at, because it is unseen, and there are no cues to assist us.
I think the angle and the lightness against the dark background of the arm of the gentleman on the left, leads the eye back into the image, after looking out towards where the gentlemen are looking.
The colouring adds to the relaxed mood. I sense companionship and friendship, expressed through their relaxed hand positions, and body stance.
When I zoomed in to look more carefully at their facial expressions, I noticed a hazy/fuzzy pixelly stuff around all of the objects, but not through the solid areas of colour. Not being a very technically proficient photoshopper, ..what is this?? I would appreciate a little help with my own understanding of this phenomenon please.
Thanks for posting this image and this opportunity. Julie