Corned beef brings out the Irish in me, specifically the Irish American. The truth is the Irish traditionally ate very little beef, relying on mutton as their primary meat source. Instead, it appears it was the Irish Americans that connected the holiday with corned beef — not that I'm complaining, mind you. Corned beef and cabbage (and potatoes, turnips, and carrots too) are one of my favorite meals.
And in case you were wondering why it's called corned beef it's because the large kernels of salt used in the brine the brisket is cured in were called corns.