I'm not a fan of commercial salad dressings. Homemade salad dressings are fresh, free of additives and preservatives, and you can control the quality of the ingredients, the taste, and the texture.
This basic vinaigrette is like a little black dress that gets pulled out, works for most occasions, and never goes out of style. This vinaigrette is nothing dazzling or special. But like your favorite black dress, the simpler the better. Accessorize it, tailor it to your personal style, and you've got a trusty little winner.
I've used raw apple cider vinegar as it has so many health benefits, and is a more alkalizing option. But, use regular white vinegar if that's what you have. Tweak garlic, mustard, sweetener, salt, pepper, and parsley to taste.
This vinaigrette will keep in the fridge in a sealed jar for about 5 days. But, it never lasts that long.