When I bought my Kiev4 with a J8M (made in ´66) I thought it was kind of a disposable camera, just for the price I payed. The seller said, "OK, it´s a russian made camera, and you know... ". I shoot a first roll of Ektachrome 64 just to check if everything was OK or not.
The first slides told me this was among the best lens/camera combination I would ever find. I still think this way after 29 years.
I took a picture of a nylon mesh at about 1,5 m. I can count the threads, so sharpness isn´t an issue with my lens. Colour rendition? It is the same as the classic german made Zeiss and Voigtländer lens, not too saturated but as my eyes see the subject, and this is satisfying for me.
Then I think that there is nothing else than personal taste, and sometimes (for MY side) a wrong exposure guesstimation.
Cheers
Ernesto