I just upgraded to a C8 myself from a pretty old and crappy Sony TV.
This is my first OLED and I got to admit I am a bit overwhelmed with all the different settings when it comes to picture quality, especially as the description of what the different settings are doing are pretty vague.
I started out with the settings provided by RTINGS, however it seems like the settings on the website and the ones provided on their youtube channel are different? e.g. for HDR they recommend Technicolor Expert on the website, but on the video they recommend Cinema as the preferred starting point.
In addition to that I think with one of the recent firmware updates the white balance preset was changed as well, so I am not sure if "warm2" is still the go to and it seems like RTINGS is not updating the website once firmware updates hit.
Should the website settings still be used a starting point to get the optimal settings? Right now I am happy with the picture quality, the only issue I have is that whites seem to be extremely popping and almost "glowing" in a a way that it hurts the eyes.
I have the Oled light already set to 50 (average room recommendation is 56 according to RTING) and I still have the feeling that the picture and especially the whites are extremely bright. It seems to get better when I switch the automode on which is fine for watching cable TV.
However for HDR the recommended setting is to have the OLED light at 100 as this seems to be a requirement for HDR?
Maybe someone can share some insights, meanwhile I will try to dig through this thread as well, but considering the size this might take a while.