If you're Irish and you think that it's "in your blood" to like potatoes, then you should probably know the back story of why people of Ireland have and still are very potato oriented people. The Great Famine, or the Irish Potato Famine, ravaged crops and was the cause of death for a million people in Ireland. As potato blight killed the crops, millions were left without food, causing them to emigrate to other countries and for many, to perish. It was a historical point for the Irish people, and many moved to countries like Australia, England, Scotland, Canada, and the United States.
This is why so many people from these other countries can claim Irish heritage, and why the USA claims a great percentage of their population have descent from the country. If their ancestry were traced back, it's very probable that their lineage left Ireland during the Potato Famine to avoid starvation, and to better provide for their family.
Today, we still love our potatoes. We cook it in stews, we mash it, we boil it, we bake it, we twice bake it, we scallop it, and we fry it. Our dependency on the potato isn't what it used to be, but those grim events are a reminder that crop failure does happen, and that we should be thankful for what we have today! To commemorate our dependency on the potato, Irish Curlys has created the potato t-shirt. It looks pretty tasty, and features a green, Celtic text with a big ol' potato on the side. Do you want fries with that?