With the proviso that defaults are at best just starting points -
Not talking about color calibration, but more "I like my brightness to be at 60 for everything" sorts of things.
Color calibration goes hand-in-hand with the Basic settings and influences them strongly, IMO, so I have to start with that. I use Camera Neutral because it gives a gentler (more film-like) highlight roll-off. Actually I use the Invarient derivation of the Neutral DNG profile created by Nik Player http://www.nikplayer.com …ant-untwisted-camera.html
because it allows me more freedom with the Recovery slider.
On the Basic panel the top four (including Black) are zeroed, Brightness is 64 (my cameras meter low) and Contrast is 32. Clarity and Vibrance are 30.
On the Detail panel the defaults are Sharpening: 100/0.5/15/30 and NR: Luminance 3, Color 20.
The Tone Curve is off by default.