>>3095687cont...
You're really doing some interesting investigations with highlights in some of these, this image in particular. I love the shapes of the rimlights. Again I think a tighter composition would be better. If these weren't silhouettes perhaps this comp could work as is, but since they people are already so abstracted cutting them off with the frame in awkward places doesn't really matter anymore. Pic related.
All in all these kick ass OP. Keep exploring and obscuring. As far as seeking these scenes out, when you're shooting are you constantly on the move? If so, I'd try finding scenes where the light is right and then waiting for the right moment to happen within that light. Scout locations while running errands and keep a mental note of the places that seem to have those special moments of light and what time you saw that light happening. Revisit with a camera and wait.