I don't unfortunately use my 42C2 as a daily monitor more for a TV, so others maybe able to answer it a bit better, but I believe it should be fine.
I can point you to the LG companion app though, this is good tool to make your C2 more PC monitor ie it goes on when you switch the pc on and off when shut down etc, its found here
You also have colourcontrol app which helps tweaks and similar features.
Try the above 2 tools they should hopefully make it more PC monitor type experience for your OLED.
Yes you may notice the whites are duller especially if coming from an LED monitor or LED TV, they can display whites more brighter and whiter so the OLED white is not quite the same as LED screens white but your eyes and brain do oddly adjust after a few days and it becomes normal. With LG OLEDs atm its totally normal, LG are improving this with MLA or Meta technology in the future and QD-OLEDs (another technology) are often more whiter whites but we may not see this tech in 42" and smaller size screens for a quite a while.
Thanks again. Am going to check out those apps. Like the idea of the shutdown etc ...
I have my Philips 436M6VBPAB (which I have used for years) set up behind the C2 just to compare the same stuff ... At first I wasnt sure I would like the C2 but now; Im really starting to like it. Really like the glossy screen (I used a old catleap monitor which has a glossy/ips screen and the screen was beautiful. (still have the monitor but nothing uses dvi connection anymore (only my old 970gtx - anyways ... Really like the contrast with the C2 and how I could have one picture and then another right next to it with different colors etc and I dont see them blend in like my Philips 436M6VBPAB. I dont have any issue with the txt its fine to me. Just not totally sure if the 42" is big enough the philips technically is 1" bigger and to be honest I would like it slightly bigger then this; 45" would prob be perfect but they dont make 45" so still debating about a 48".