Oh, I was a total bookworm as a kid. I remember a book I turned into a cabbage when I was 6 -
The Wonderful Adventures of Nils by Selma Lagerlöf. Read that over and over again, always carried it around, what a weirdo.
Books by Astrid Lindgren were always my favourites.
Karlson on the Roof;
The Children of Noisy Village;
Ronia, the Robber's Daughter; the
Pippi Longstocking series;
The Brothers Lionheart; etc.
Later on I couldn't get enough of the Sherlock Holmes stories by Arthur Conan Doyle. The Tarzan and the Martian series by Edgar Rice Burroughs.
Dracula by Bram Stoker.
The Three Musketeers and the sequels by Alexandre Dumas.
The Leatherstocking Tales by James Fenimore Cooper. Books by Karl May with the characters of Winnetou and Old Shatterhand.
Les Miserables by Victor Hugo. Anything by Agatha Christie!!! Basically, I read anything with a hint of adventure, thriller, crime, mystery. Good times.
In my teens I expanded my interest on to works by Jane Austen, the Brontë sisters, Shakespeare...stuff like that.
I was and still am into the classics a lot and even though I read anything that piques my interest, I always turn back to the classics. Oh, this is great, it brings back so many wonderful memories. Now I want to start reading those books all over again.