The first photo is an example of deep dof because of how despite the distance of the bridge, you still receive a clear, crisp view of the possible end it gives. I liked this example because of the symbolism of the never-ending bridge and the relation to how our lives and the possibilities beyond don't end.
This second deep dof is one I like simply because of the fact you can see the city in nearly its entirety without losing the prospect of it being a city. I love the lights and colors and how it reflects the idea.
This is an example of shallow dof, hence why you only see one lantern clearly than the others. To me it gives a sense of definition and hindsight to what the lantern could represent - maybe a holiday?
This is another example of shallow dof, the cute kitten being the center of attention as in the background's business is clouded out, leaving the cute furry creature the main eye-candy.