I can’t pick one soup. My fav’s are:
Minestrone (I don’t like when it has a lot of herbs in it, and I don’t want any cheese in it. Gross.).
Lentil (all types).
My black bean soup (which is a version of Frijoles Charros without the bacon. The bacon version is of course much more amazing).
Matzoh Ball soup (especially my grandmother’s).
Japanese onion soup (I don’t know what it is called).
French onion soup no croutons (I hate soggy bread).
Olive Gardens Pasta Fagioli (I can’t believe I even write that, because most of their food is disgusting, and their pasta fagioli is nothing like anything you would find in Italy as far as I know).
Wonton soup (I especially like it with small julienne type slices of the red pork is added to the broth and some bok choy in there for some green).
Split pea (no dairy in there at all. Again, gross).