I picked this book up the other day and I've been reading it in every spare moment I get:
Feynman was a pretty crazy guy! When I was younger I read his autobiography, "Surely You're Joking, Mr. Feynman!" and it definitely changed some of the ways I look at the world and approach problem solving.
"Six Easy Pieces" is amazing! Feynman's discussion about atoms, the electromagnetic field and energy is actually pretty easy to understand (as the title would lead you to believe) and he provides plenty of analogies to help you visualize the concepts. I haven't gotten to the chapter on the theory of gravitation yet but I can't wait!