The speaker of "Filling Station," believe it or not, admires this place. The admiration unfolds slowly, and even secretly, as if the speaker doesn't really want to own up to it. Bishop doesn't pull any punches in highlighting what is wrong with the place, and though it doesn't seem the speaker could love a place like this, it seems she clearly admires the family for making a home from it, for caring for the plant and the lazy dog. She might not love this joint, but she thinks it's pretty cool that they do.
The speaker admires the people in the filling station because they are capable of caring for a place that she could never appreciate (because it's too dirty and run-down).
The speaker doesn't admire the family at all; in fact, she thinks she's superior to them.