What a great idea for a topic!
Matilda is one of mine too! It taught me adults don't always know better, to want to read lots of books, to be kind and it made me love magic.
A more recent one is Queens of Geek (by Jen Wilde), it made me realise it's possible to have autism and have anxiety too. It got me to look more into my own anxiety and seek help for this.
Hmm.. anything else.. I'll have to think deeply. I can't always remember the exact title of books I read in my childhood (because they were library loans).