Romaine lettuce is very green
You're right about that. I like using romaine lettuce when I make stews and soups, because it's tolerant of heat unlike most lettuces. Keep's the crunch!
Which salad dressing is your favorite?
I really like Italian dressing, the blend of water, vinegar, chopped bell peppers, and dill is just a one of a kind flavor for me.
I prefer caesar salad dressing.
That's a good choice too. Caesar salads have a unique taste I think, probably due to the worcestershire sauce, garlic, and parmesan cheese. What a combination!
I also like adding olives (green or black)
Definitely a healthy edition, I like the lazier olive oil version, which is the liquid fat obtained from the olives.
That could make a good spread.
Olive oil
Olive oil is a liquid obtained from olives (the fruit of "Olea europaea"; family Oleaceae), a traditional tree crop of the Mediterranean Basin. The oil is produced by pressing whole olives. It is commonly used in cooking, whether for frying or as a salad dressing. It is also used in cosmetics, pharmaceuticals, and soaps, and as a fuel for traditional oil lamps, and has additional uses in some religions. There is limited evidence of its possible health benefits. The olive is
Romaine lettuce
Romaine or cos lettuce ("Lactuca sativa" L. var. "longifolia") is a variety of lettuce that grows in a tall head of sturdy dark green leaves with firm ribs down their centers. Unlike most lettuces, it is tolerant of heat. In North America, romaine is sold as whole heads or as “hearts” that have had the outer leaves removed and are often packaged together. 
Commercially sold romaine lettuce has historically been the subject of product warnings by both U.S. and Canadian health authorities