As a kid, "Alexander the Green Horse with Red Stripes". About a boy who misbehaved and blames everything on his toy horse (way predates Calvin and Hobbes). They day it arrived as a kid, I had done a lot of the things the horse was accused of and apparently I accused my mom of making up the story to fit my day
As an Adult, Tacky the Penguin because everyone in my family said I was the "Tacky" in our family
As a kid, probably the biggest influence on my life by a book was a book I read in school about a boy who took scuba lessons. I even remember when I took my course thinking it was like the book. I could not remember the title but knew what it looked like and after years found it and bought a copy. (I even had my mom track down my now retired teacher to see if she remembered the books in her class) it was a book that set me on a path that changed my life