When I was walking around campus, my eye was immediately captured by the pattern of the truck grill. I thought making the photo black and white would help emphasize the value of the grill, as well as the slight texture evident in the wheel tread.
In this photo, I wanted to emphasize the orange and green colors of the flower, so I took away the distracting background colors and went with a black and white photo. The effect was immediate; the viewer's attention is instantly captured by the flower.
I liked the two very different shapes represented in this photograph; on one hand, there was the coffee cup--rigid and man-made--but behind it was the organic, hard-to-describe shape of the flowers. And of course my unintentional selfie reflected in the cup.
Contrast was really the principle I was aiming for in this photograph; with both regard to color (yellow and green) as well as the actual tonal quality of the subject--including both the bold highlights and deep shadows I tried to bring out using the curves adjustment in Photoshop.
I enjoyed experimenting with the different textures here; the rough rectangles of the brick work, juxtaposed with the almost vertical white tin. I also tried to play with the angles created by the lines in the photograph, and really make the viewer's eye follow along.