Very well said. But then pets do each have their own personalities. My male pets (Taggart & Jax) are the goofiest pets I've ever had. I don't know if that has to do with getting them both from the same shelter (where I volunteer), but that's one thing I tell the adoptive parents there.
Paizly came from the streets via a fellow PTer, and Zoee came from a breeder(). While they are wonderful pets they are just more reserved and only have goofy moments.

But I do agree with this statement: There really aren't any bad pets, just bad owners. Sometimes people just do not have the patience or the knowledge to deal with a "difficult" animal to help rehabilitate it.