If you ever, ever come to Louisville, take the time to eat at a place called Mazzoni's. Its located across from the Bowmen Field airport. Best chicken livers around not to mention the best rolled oysters I have ever tried. Mazzoni's has been around since the late 1800s. They ought to go global.
Back to the subject of organs.
Gizzards are a bit chewy for me, and I agree it is kind of weird to eat these things but I guess it is what you are raised around. I draw the line at a few things myself such as snails. The thought of them makes me gag.