It was Five on a Treasure Island that got me hooked on reading - one rainy Saturday I noticed it was the same squiggle on the spine as the Noddy books (realised years later it was supposed to be Blyton's signature), sat down, started reading, and about 6 hours later emerged blinking with a very numb bottom!
I was 5 and rapidly worked my way through the Famous Five, Secret Seven, Malory Towers, St Clares and any others that turned up at fetes and charity shops and eventually I got pocket money and got the last half-dozen new!
I do remember hoo-ha about racism and golliwogs which was why the library didn't have them, which confused me totally. Firstly I lived in an area where signs just said 'no dogs, no Irish' rather than mentioning black people as there just weren't any (and yes, such signs had been illegal for a few years, this being 1978/9), but the refs to golliwogs always had them as the Mayor and similar authority figures in snazzy suits with shiny buttons. It didn't occur to me that a golliwog was anything to do with a black person any more than a golden teddy bear was a blonde person! So I was still pretty confused until a couple years ago when instead of just alluding to the Black and White Minstrel show, some TV documentary actually showed a clip and suddenly I was going Oh My God! It's true, gollywogs really were taking the piss out of black people - or rather being doll reproductions of people who were - but without seeing that I'd never have made the connection.
I've re-read a lot of Blyton recently (parents shifted all my stuff to my house), and the classism now really stands out, but at the time it was exactly like everyone I knew in a nice little town in Surrey. Actually said town probably still has the same attitudes, just a bit more subtlety about expressing them.