> I stir every last one of my Gin Martini's no matter what else goes in
> them, I was told once that shaking Vodka Martini's was fine, because
> the liquor won't bruise (or cloud)
I don't know about bruising but vodka martinis most certainly do cloud. A
stirred martini looks like water, a shaken one is nearly opaque white. When
servers ask me why I stir I point out this difference and ask them "If you
were taking a photo of a martini to put in a cocktail book, which one would
you use?"