I've seen the 3:1 vinaigrette ratio before, and can't agree with it. 3:1 is fine with some vinegars and for some salads, but many (to my tastes, most) salads benefit from a sharper/more acidic vinaigrette. I tend to use 1:1; with balsamic, I often push it to 1:2 oil:balsamic. Generally, the flatter the salad 'base'…