One of my favorite things about Seoul was the food. Restaurants must make up 50% of the businesses there, as this is what many storefronts seem to be. Not only does this mean that you have a variety of kinds of food to choose from, but it also means that most restaurants are quite inexpensive.
Though we paid more for some meals, if you didn't get drinks, dinner cost around $7.00/person -- and it was excellent food, and there was always a lot of it!
Some favorites =
The Best Sushi Ever: