Thought I'd chime in with my settings. To each his own, but I did a ton of testing in a lot of different conditions (outdoors, tungsten and LED) and I've found that -5,0,0,-5 consistently yields the best results that I could come up with. (Sounds like what MaxAperture is doing as well.)
I started with everything at -5 to give the flattest image with the least chance of artificial signal enhancement, but in my tests -5 sharpness and -5 saturation actually harmed the image by throwing out actual picture information.
I then have a recipe of filters than I run on all footage (Neat Denoiser, SC Sharpen and finally FilmConvert) that I feel gives everything a very nice, natural look before I grade for style.