Upload & Sell: Off
You can ask that question here, but better to hear from us bad 'ol Nikon shooters what we use, too. The answer, for those of us who shoot a variety of things, should be, "It depends." Portraits, single point autofocus in S mode. When I'm shooting moving targets, like dancers during a performance, a bride walking toward me down the aisle, I'll switch to C mode with 3d autofocus.