The flavor changes drastically if you use a specialty vinegar. Try to prepare a basic vinaigrette using red wine vinegar, balsamic vinegar, cider vinegar, rice vinegar or herb flavored vinegar.
For a milder taste, substitute half the vinegar with water.
For a white vinaigrette mix 2 tablespoons oil, 2 tablespoons vinegar and 2 tablespoons milk with a little salt, sugar and prepared mustard.