Thanks for your answers. Rooms are dimly lit to average lit if that helps. The subject's hands are sometimes blurry so its not camera shake. (I nailed that with my AE-1 !)
I always treated Aperture Mode as a means of controling DoF, whereas Shutter Mode was for controling camera & subject blur (or lack thereof). If that was the starting point would I not be better off in S mode and set the shutter speed to say 1/200 and let the camera adjust the aperture and ISO to suit?
Q3. What is the highest ISO I can use and still get reasonable 4x6 prints? (These particular shots will never be severely cropped or enlarged.)
(I am thinking I could make the necessary settings in P mode and have them there when needed.)