I am a photographer that is actually a portraitist, and I print some of my pictures in big (if not huge) sizes, so resolution matter in this case.
Not noise, if stochastic, I could live with that, the same way I accepted noise in film, if it doesn’t look like a digital artefact.
Noise is not an issue if the truth of the subject appears clearly, even behind it.
Source Article from http://www.dpreview.com/articles/0250956781/sony-adds-xavc-s-and-high-bitrate-video-to-a6000
Started out doing photography at the age of 6 using an uncle's old 1940 kodak brownie box camera. At 15 years of age, I decided to buy my very own 1975 Praktica SLR camera. I now shoot with a Nikon D850. I do unpaid TFP and commercial paid work. 
