The beauty of both DS & PMG's acting is that they don't have to chew the scenery and wave their arms around in order to act (though they both did their fair share of that!) Some of their best moments happen when they speak little or not at all, saying all with their eyes, their expressions - even body language.
I was a Starsky-girl at 10, grew up to be a Hutch-girl, but I get the greatest pleasure watching both of them on screen. They strike sparks off one another; they're amazing!