Good topic, the moral of it to me is that you go to any area and don't eat the local specialty you are doing yourself a grave injustice. I left Ohio 6 years ago after being there all my life. I miss food there yeah, but I have a lot of new favorites as well.
There is a Mexican restaurant that serves a beef brisket taco, not on the menu and only in Texas will you find great Tex-Mex like it. Brisket down here is the best. In my 6 years down here I have really come to love it the most; but anything barbeque is gonna be good. (I think Tenessee barbeques pork a bit better.)
I like all the Cajun food that has found its way a few hundred miles West as well. Louisiana knows how to cook. I need a wheelbarrow to haul my ass out of that state every time I am there.
Southerners in general can fry things a Yank like me would never think of frying and make them incredible. Fried corn on the cob, fried Okra, fried turkey, the list goes on and on. Chicken Fried Chicken, and Chicken Fried Steak still confuses me, like em both. The white gravy that gets poured onto everything is delicous as well. I recon' y'all can keep your sweet tea to yunselves.
Soo many of you New Englanders mentioning clams. I really love the clams called "steamers". Dip them in the seasoned water then the drawn butter, delicious!! Chowder is great whether red or white and the two factions can debate it all they want, I'll keep eating both.
I have a friend up in Chi town and leave there 10 pounds heavier every visit. I love the juice dripping Italian beef sandwiches, and deep dish pizza, but you are forgetting to mention Billy Goats CHEEEEEEEEEBURGERs!!!
I grew up in central Ohio and there weren't too many regional specialties. We have Amish restaurants here and there, and farm markets with produce (especially corn) I just can't find the likes of down here. I smuggle Red Gold Ketchup (produced in Ellwood Indiana) down here after trips to Ohio, the company wouldn't distribute it out of a few state radius. I have gotten cravings for White Castle and Skyline Cinncinati Chili lately; I will try to get some of each when I head up in November.
Gotta say the local food I miss the most from Ohio is my Mom's cooking.
Matt