This is lighthearted!
When I read a really great book, I have such a strong image of that character in my head, like I really know them. In a completely irrational way, when good books are adapted for the screen (as they often are), I feel like the casting directors rob me of people who I have already got to know so well. The picture of the character becomes less clear, almost foggy in my head. Like I said, it's irrational, but like my husband says, if it bothers me so much, I should stop watching the adaptations!
For example:
Big Little Lies. Madeline and Celeste are cast so wrong! I would have had either Kate Beckinsale or the Mum from Gilmore girls as Madeline (she's described as a dark haired "glittery girl", who may not be the prettiest, but always accessorise themselves well), and Charlize Theron as Celeste. Jane is pretty well cast, I had imagined someone much more petite though, like Kate Mara. Can't fault the casting of Perry! Oh and I'd have had an Olsen sister for Bonnie.
Does anyone else have any favourite books that were miscast for the characters that you had already built in your brain and loved? Or am I alone in feeling totally put out by casting directors just doing their jobs?