THe tilt in this photo works with story you are conveying. The cut frame takes a little away from it but I can kind of see your reason for it with what looks like a very distracting background. I think a little work in post could really strengthen this up if you tweak up the colour channels to strengthen the shot.....I would make the bag perhaps a bit lighter to seperate it from the garbage bin, the guy the darkest point thus creating the point of highst contrast and the anchor of the frame and the garbage bin a mid tone...you are almost there but the high contrast melds them together making the shot flat...with a little more seperation between the tonal range you would get a better figure to ground relationship and a lot more pop out of the photo.
The photo is uncropped. I only resized it so it was easier to upload. This was a fairly difficult on to capture, though. I took this shot while holding my camera over my head with one hand and my nose with the other. And this was as wide as I could possibly go with my 18-55mm kit lens. True, the compo suffered because of this, but I'm glad that I managed to grab the shot while I could.
Your critique is spot on as always, my friend, and I will try and improve on the points you've mentioned. Thank you very much!