Chef here, dressings come in creamy or oil/vinegar base, typically.
Oil/Vinegar is a simple formula
3 parts oil (evoo is best)
1 part vinegar
generous amount of herbs or spices
a little dijon mustard
salt, pepper
parmesan if you wish
Creamy dressings can be a variety of things but if you start off with mayo and add a little vinegar, you can add whatever herbs, spices, cheese you desire. add a little salt if need be.
just taste the stuff before you finish making it.
does a little sugar/maple syrup boost any dressing? it sure does. is it critical? no.