We have a D70s and a D200. I don't get to use the D70s much as it is my wife's camera and she keeps my 24-85mm f/3.5-4.5G AFS lens for my film camera mounted most of the time. It makes a great candid portrait combination (e.g. grandkids).
There are occasions when we want to downsize for a evening out or very long walkabout - then she takes my SD700IS and I get the D70s with usually a 24mm f/2.8 AFD or 35mm f/2 AFD lens. It takes great images and it's compact size is a welcome change for some occasions. I find it very usable and I usually get over "cursing" it's "backwards" controls in a very short time.
When you make it about getting the picture, many/any of these "old" cameras work pretty darn good.
Roger It is still ISO, aperture and shutter speed, right?