Do you have a boot fetish?
I'm kidding.
I like this first one ok, though I'm not sure about the composition. Maybe the boots are too small in the whole image? And the wheel being there while the boots are in the center makes it feel odd. Also, I feel like the paint on the house probably has a lot of texture, but the whites are so bright that I can't see most of it.
The others, as Einstein said, seem kind of random. Boots on a porch, that's perfectly normal. But boots behind a sign, on a railroad track, and on the side of the road - why?