For me, photography is like a treasure hunt. I take my camera out for a hike, and the quality of what I bring home depends on two things: 1.) what I find, and 2.) my skill as a photographer.
One concept I always keep in mind is that photography is a “subtractive art” (like sculpting), not an “additive art” (like painting or cooking). When you compose the shot, you are eliminating the vast majority of your surroundings to create a simplified, focused, appealing photograph.
I pay close attention to both tonal contrast and color contrast. Either of these give an image some punch, and I don’t think subjects that blend with the background make for striking images.