How can I add a savory note to (or otherwise improve) a sweet, cream based salad dressing? I recently purchased a cream based salad dressing and it is VERY sweet with an aftertaste, what can I add to make make it more savory and just make it taste better?  

I love salad and my veggies are so sad with this dressing...
Frequently the savory notes in a cream based salad dressing would be from a pungent cheese of some sort, like bleu or Parmesan. You could also try cutting some of the cream with buttermilk to reduce sweetness. Beyond that, it will really depend on what the rest of your ingredients are. Adding garlic powder or onion powder could also help depending on what flavor you're going for.