I really like the photo. taken by my wife during our most recent road trip, which ran here yesterday. (Scroll down -- thru Z magic of blogging it's still here.)
Then aggressiveness of the black/white contrast, a motif the cat fits into perfectly, is what I like.
The funny thing about great photos is they're almost all accidental, or at least their effect is untintended. What a great composition though intentional or not, is Sammy the travelin' cat relaxing.
Reminds me of some of the 17th century portraits of military types I've seen; those devils who ran the 30 years war, such as yr famous Count of Tilly, Johannes Tserklaes, whom we see impaling us on the evil beam of his one good, right eye.