I read a lot. I read for about an hour every day. I'm a slow reader, maybe 15 pages an hour, so it generally takes me about a month to read a 500 page book.
Still, I've read a lot of books in my life and Hitchhikers Guide to the Galaxy is the only fiction book I've ever started and not finished. I bought the complete edition that had all the stories combined in one book. I read the first two stories and gave up. I wish I could understand the appeal of it.

I was about 20 when Harry Potter came out. If that had been around when I was a kid, maybe that would be my answer. I found it entertaining enough as an adult.

We had to read A Wind in the Door when I was in fifth grade. I read that again as an adult and it was ok. Wouldn't read it again though. Some day I want to read Watership Down again. Loved that as a kid. I read The Stand at 15 and again at about 25. Not a kids book, but probably my favorite book. Currently reading the books from the Robin Hobb Farseer universe. Those are considered young adult fantasy, but they are great overall. I'm going to finish the 13th book in the series today.