I use cast iron exclusively. Over the years I've acquired a "set" from a small one that only one or two eggs will fit in to a ginormous one that would fit a small turkey. They've all been used and abused, except for one that was my great grandmother's. To clean a used one I put it in the oven on the self clean setting and everything burns off. Then it can be washed and re-seasoned.
This afternoon I cooked down some chicken bones in a cast iron dutch oven. The whole backyard smelled delicious!