Bacon bits, chives, chopped green onions, dry ranch dressing mixed with mayo, mustard, relish are all common items to put in. But you can do a general mix (mayo & mustard) then one at a time try out ingredients and flavors you think might be good. Some of my favorites to add to standard mixture are a little cocktail sauce mixed in with baby shrimp, powdered ranch dressing, bacon bits finely chopped favorite nuts for crunch, you can add finely chopped vegetables like celery or carrots, sweet potato pieces, the sky it truly the limit. Let us know if you create any new combinations.