Nikon F3. Just a beast of a camera. In production from 1980 to 2001, even after its replacements, the F4 and then F5 were brought to market. Solid, smooth, versatile. Everything one needs, and nothing more.
The following tips are meant to not only help you maximize efficiency, but to also make your life a bit easier by not having to think so much. Most of these tips apply to any of Nikon’s latest cameras, including the D4s, D800, D810/e, & the D750, but it’s focused primarily on the D750 features. Some features may be in the older models, but these are just the cameras I have used and know for a fact they are implemented in the UI.