I do the same thing, sort of. Although I don't make enough to freeze, I'll make myself a pot of soup to keep around for a few days' worth of snacks and lunches. I recently made vegetable-barley.
Usually when I make soups, I use a bunch of veggies, sometimes meat but not always, and either barley or some type of bean like blackeye peas, lentils, split peas, or even some canned beans, like cannellini or navy or soy.
I'm sure there are lots of sites out there that have great soup recipes, just do a seach and see what you come up with