what's the subject? How can you make the subject standout?

i think, you could have used the rule of thirds in a couple of those photos to lay it out better. especially in the photo of the escalators. the escalators could have been 2/3 of the photo instead of most of the photo.

I think with the street photos, play around with where you place the camera. try a couple photos with the camera close to the ground to change the perspective a little bit. Also, i would crop out some of the street or lower the horizon... i would also use rule of thirds here, or place the focus off center...