If I'm making a cucumber salad, I typically make mine with Asian ingredients (sesame oil, soy sauce, rice vinegar, chili, etc).
My kids have always eaten cucumbers dipped in apple cider vinegar as a snack or with their lunch for school when they were little. I suppose that is the simplest version of a cucumber salad.
I have never eaten or seen a creamy version until recently. Several different recipes for creamy cucumber and radish salads have been popping up as suggestions for me, but I haven't tried it yet.