I was thinking that if the stop sign were in focus, but the background was blurred, it would be very very cool.
The spraypaint and beer photos are good, too. I don't really know why I like the beer photo (I just do), and the spraypaint photo looks great against the darker can in the back (on the left side of the image) with the dull colours. My only issue is with the blue can sitting behind the main spraypaint can (ie: the subject) on the very right size of the image, because I find the blue distracting.
The photo of the tools is good.
The sepia streetlights are OK, but I think they'd look very blurry if viewed at a decent size.