We did a 10 pt. white balance and colorspace calibration on our Samsung JS9500 for our review. Here are the picture setting results.
Movie mode has the best default settings. It is good for TV shows, movies, and sports. For playing video games, though, you will want to turn on game mode to lower the input lag.
If you find our settings too dark, increase 'Backlight', not 'Brightness'.
Turn on 'Auto Motion Plus' if you want the soap opera effect. 'Smart LED' is the local dimming feature. We turned it off for our calibration, but if you like it, leave it on.
Setting the 'Color Space' to 'Auto' or 'Custom' is for Rec 709. If you want a wider color gamut, set it to 'Native'.