For some reason, I am not fond of adding anything sweet on my eggs. Just a personal preference. In fact, if we go to a restaurant where they put pancakes and eggs and bacon on the same plate, I will always eat the eggs first, lest they get pancake syrup on them.
Regarding Deviled eggs or Egg salad, I use: French's mustard, Best Food Mayonnaise, salt and pepper as the basics. When I want something special, I'll add either Dill Weed (not a lot) or Beau Monde seasoning instead of the salt (from Spice Island) or chopped up crispy bacon. The chopped up crispy bacon seems to always win, hands down.