Russet potatoes are always a popular choice. They're large enough to make one potato a great serving size for one person with enough surface area to work with. The skin is sturdy and delicious when crispy! You can also use Yukon gold potatoes as they too hold sturdy. Their skin is a little more delicate so be careful when you're scooping out the flesh. If you're serving them for snacks or side dishes for you and your family, use what you have. If you're serving them for guests, head to the grocery store and pick out nice-looking potatoes that have smooth skin and are similar in size.