I've been off reading lately, but used to whip through books so fast I wouldn't reread them for reading a new one. The list of straight up rereads is fairly short though, now that I think on it. I revisited My Side of the Mountain recently, and that was still fun. Small wonder I'm in love with birds. In my last year of middle school and first year of high school I was rarely without either
Winterdance (Paulson) or
Kon Tiki (Heyerdahl), even after I'd read and reread them. I suppose they were good and grand adventures to escape to when you'd rather not be in class. Other than that though, there's
The Foxman (Paulson again),
Gifts of an Eagle (Durden),
Fullmetal Alchemist (Arakawa, yes, a manga, and yes, all of them), and probably Mistborn and The Way of Kings (Sanderson). I should think there's more, but I can't think of them for the life of me.
Turns out I'm not much for rereading