Crisp is great - Korean fast food is how I think of it.
While we're on the topic of Korean, there's a tasty Korean BBQ place on Foster and Western that I've been to several times. I seem to remember an old Korean friend who took me there the first time telling me that it's open 24 hours, but I don't remember if I ever verified that. Every time I've been there, I've been one of relatively few white people in there. Service is a little...lackadaisical. And you must get the seafood pancake appetizer thing (which is big enough for several people as an appetizer or a meal in itself for one or two people).
San Soo Gab San
5251 North Western Avenue
Chicago, IL 60625
(773) 334-1589