I have quite a few pieces of cast iron, but mostly use just three.
1. I have one of the deep chicken fryers with a lid. I bought it at Alpine Hardwear in Alpine Texas. I bought it the day JFK was shot. They had the radio on and that was when I first heard about the shooting.
I use this deep skillet for roasts and a wide variety of other dishes I put in the over.
2. I have an old Wagner Fat Free Fryer that is used for bacon, sausages and other things on top of the stove. It is a very shall skillet with a slight dome in the middle that causes the grease to run to a trough on the sides.
3. I have an old Wager square skillets that goes on top of the stove and also inside the over with bisquits in it.
I have others including some pretty good sized kettles.