I can see that, about the new things causing anger...
It's been a while, but there was a thread here at one time where it was discussed that they not only follow a script, But also have a very similar checklist of things that will make them happy. And one by one, they check those things off only to find another skeleton they weren't expecting.
I don't ever want to completely understand the confusion and anger that they have, but I would be lying if I said it did not intrigue me to some extent.
