...behavior in accepting Mr. Collins does not strike me as anything out of the ordinary. Yes, Charlotte never concealed her feelings, and Lizzy never read them properly. But how often do contributors to this very web site expect Darcy or Lizzy to act not as the characters act, but as the contributor thinks they themselves would act?

It is common for us to think people we like think pretty much as we do. Is that our own pride and prejudice showing through just a little? JA seems to have captured that very nicely. For all her ability to observe and judge character, Lizzy has already misjudged Charlotte; she seems to side with Wickham, whom she likes; along with her mother, she seems to side against Darcy, whom they both dislike; and she sides with her father, whom she likes.