Liked Cars at least better than Monsters Inc. Cars 2, meh. I keep going to see these under the guise that I'm seeing what Pixar technology is capable of, but I think it's at least as much that I like the films.
Cars and UP were far from failures.
Cars 2 was a Pixar failure, though.
I respect your decision to not have kids, but in this case that is clouding your judgement.