I like Mustard but I don't love it. Ketchup on the other hand, is a different story. I love ketchup.
Mustard is good on turkey sandwiches, hotdogs, and soft pretzels. For some reason I don't put it on my hamburgers. I always preferred Mcdonalds burgers over Burger Kings because BK always puts more mustard than ketchup.
And well deserved too. Between honey mustard, sweet German mustard, middle-of-the-road Dijon and the more intense coarse mustard this condiment has every base covered. I don't even know how you make salad dressing without it.
Speaking of mayonaise, I actually have a bottle of mustard-mayonaise in my fridge right now.