I like mustard but on eggs it would taste like shite and real mayo is freakin nasty, I like Miracle Whip on my fried egg sandwiches, thats what we called mayo at my house growin up. My dad always had a jar of real mayo in the fridge but no one but him ever touched it. I started putting catsup on my scrambled eggs when I was a kid because my mom and sisters couldnt cook eggs for ****, once I learned to cook them myself I could make them fluffier with lots of butter and they didnt need the catsup then. My wifes eggs are pretty bad I put catsup on them. Best just to make them myself.Mustard & mayo is better than ketchup.