My and my sister were huge fans when we were young, but my mum always hated them, they are very un pc.
I have got a couple from the library for nostalgia's sake and it's so weird to read them again now! I always remember them as being pretty innocent stories, but I had forgotten how dramatic some of the adventures are (eg the Famous Five stuck in a cave with a man with a gun) and also how ridiculous some scenarios are (though I know it's partly cos they're so out of date now). Famous Five again - in the cave one of the boys went off to get the police and HE was leading the police (who were weilding guns too) back through the cave!! Made me chuckle.
I can sort of tolerate the sexism in them because it was the time Enid Blyton was living in. The classism is appalling though, and racism in a few, and all the stereotypes ! I hate to say I'm sure I was influenced a lot by her books (particularly the school ones) and I MUST have had a very odd view of what the world outside was like!
I must say I am so grateful to my mum for being so vehemently anti-Enid Blyton as i would've grown up completely unaware of the truth of it!
My favourites were the Famous Five, The Faraway Tree books, and The Wishing Chair. I also had a fondness for Malory Towers and St. Clare's - and the Naughtiest Girl in the School which I had completely forgotten about till I saw it in the library!