Aren't the varieties incredible from Peru. I've looked at this picture of different ones and was amazed.
We eat mostly russets because they stay low in cost, for most of the year running 20-35 cents/lb. Sometimes we treat ourselves to something else, more waxy, moister.
We grow kennebecs, and I love those but we don't grow enough for all year and we don't have the correct kind of storage facility for them. I made a kennebec mashed potatoes, with water, lemon juice, garlic and onion powder, vegetable bouillon powder, delicious.