We stopped buying lettuce several years ago.
We buy either arugula or watercress now that they are more readily available. I guess our taste buds have changed as we age, as we really prefer the 'bite' of these greens over any lettuce. We use them for our 'regular' salads as a side to almost every meal. Often we 'dress' them with just a drizzle of balsamic reduction and nothing else.
We also throw either of them into omelets, stews, soups and other hot meals. .
And we always top our delivery pizzas with fresh arugula and everyone who tries it, starts doing the same thing.
And as an added bonus, watercress now tops the list of "superfoods"....see this link
http://time.com/2827608/41-superfoods-ranked-by-how-healthy-they-are/