Sometimes, the obvious answer is also the correct one. The best thing about Pennsylvania is the cheese steak sandwich. Philadelphia gets to call itself the master of the cuisine, but it's such a fine invention that it's popular everywhere.
There might be a lot of cheesesteak going around, but Pennsylvanians should also be cheesed off about the amount they're paying for gas. Tax on gas is 58.7 cents for every gallon, which is the country's highest rate.