Usually we have tomatoes ,cucumber, a little onion, sliced peppers with Bacos, sunflower seeds and dried cranberries.
The hubby like Vidalia onion dressing, I like Russian.
When we have a family gathering I buy everything I see in the produce department to make the salad. Broccoli, which I steam a little to get rid of that really raw taste, cauliflower, mushroom's, chick peas, different greens, red cabbage, chopped hard boiled eggs, walnuts, grated cheese.
I separate the ingredients into serving dishes, usually paper because there are so many and serve it buffet style.
That way everyone can make it the way they want and it keeps longer because the more moist veggies don't wilt the lettuce and other greens.