You'd be surprized at how people getting the food are happy with things we might think of a plain old ordinary stuff. I was working at a pantry and one woman just glowed at the idea of a can of tuna fish!!!!!!
One thing to remember, if the food is for homeless people, try to get stuff that needs little preparation. If they are out on the street, or in a motel, there is no place to set up a meal. One pot things are good then. If the place you are donating to is suplementing people with a place to stay, you can get just about anything.