When you're out and about, the unobvious photo may not pop out at you. It might not scream, "Take me! Take me!" The sunset screams. The travel spot screams. The beautiful flower screams (but only to women and amateurs - just kidding!).
That interesting patch of light and shadow on the side of the building stays silent in comparison.
That's why you have to look for it. And sometimes that makes it sweeter to know you had to search a bit to find it. Use your eye to frame it just right. And press the shutter button just at the right moment.
I don't know exactly why I love this shot, just that I do. The frame created by the shadow on the left and the bottom and the brick on the right makes me smile. And that's why I do this, to smile.