I've seen a few vehicles that I consider to be "cool". Not many, but a few. What I consider to be "cool" varies, but generally includes things like unusual paint jobs, interesting license plate & car combinations, strange accessories mounted to the vehicle, etc....
This photoblog used to be entitled "Cool Cars...", but then I encountered a very cool motorcycle and sidecar in Antwerp, so I had to change the name. Oh, well....