Anything at all by Robert Westall, but especially The Scarecrows
The Turbulent Term of Tyke Tyler (wasn't it just great when you discovered she was a girl ?)
Enid Blyton- anything
Roald Dahl- anything
The Chronicles of Narnia
I Want My Potty
Judi Blume and Paula Danziger
Tolkien
Diana Wynne Jones- especially Archer's Goon (did anybody see the BBC children's adaptation?)
As a child I read and read and read, to the point where my parents worried about me. Got up, read, went to school, read during break and lunch, finished school, went to library, read, went home, read, ate, read, went to bed, read... Currently doing a PhD in Literature. Still reading. Tastes have changed a bit though!