I only eat either at stadiums. My dad has indoctrinated within me a despisition (despise-ition) for what he calls "yellow" I was brought up on the lowest grade of mustard be Gulden's spicy brown (which I still enjoy), but Kosciusko mustard was the staple in the house and deli mustard outside. My grandfather always had grey poupon.
Kosciusko used to come in these tiny mugs. I had one from when I was a kid until this weekend, I loved having my six-year old drink from it. Anyway, real mustard good overly yellow stuff has its place, but it's always a poor substitute for the "real" thing.