It differs with each gun.
I like my AR to look like it has been used. That isn't a problem because it sees a good bit of dirt and work.
I like my M&P9 and Glock 19 to have some honest holster wear, again, not a problem.
However, I prefer a nice wood-stocked, blued barrel hunting rifle to look new and polished. Therefore, if weather might be bad for a hunt, my synthetic stocked, stainless barreled rifle gets the call.
That being said, I couldn't vote