On a DX camera, the 16-85 gives you the FOV equivalent of a 24mm film lens. That wide angle is indispensable if you will be shooting indoor, especially while photographing a group of people. Of my six Nikon film lenses, the 24 saw the 2nd most use, after the 50mm 'normal' lens.
At the other end of the range, you would have to weigh your typical subject matter against the two options of maximum telephoto. There's not a compelling advantage to 105mm vs 85, in my experience. Both will do portraits at 60mm. That's a kind of benchmark focal length for portraits.
I've got the 16-85, and also a 60mm ED Micro and 12-24. Both the 16-85 and 12-24 are handy at parties and small events.