I like to experiment using replacements for standard ingredients. For instance, I hate store-bought mayo (and rarely have time to make my own). So for a simple tuna fish sandwich, I often use hummus as a binder (various flavors create completely different tastes; I currently love the hot pepper hummus with tuna). On occasion, I use sour cream or a sour cream/creme fresh mixture with tuna, potato salad, or a lobster roll.
Anybody else like playing Dr. Frankenstein in the kitchen?