Good morning Les/ Leon and a lovely day it is too (on Anglesey anyway)
I suspect that all three opinions are correct for each of the individuals.
I suppose we are exceptionally lucky to have so much choice not only in film material but also in capture methods.
The thoughts that led to the question arose from watching a digital demonstration the other day when the operator deliberately added noise to a shot to give a grain effect. Reflecting on this as the day wore on I wondered why he bothered when the shot had enough 'oomph' as it stood. The search for this 'must have' seemed to overcomplicate matters and take away the joy of the final print.
I know my customers gravitate towards the 'clean' prints far more than the grainy ones but then they are mere mortals not photographers who KNOW what a print should look like