MarkoKovacevic
Well-known
But it's generally a technical concern. Good art is more in the concept.
So, what this really comes down to is grain right? Lack of grain turns many off. However, grain isn't everything and generally speaking grain does not make a bad photo great.
It's mainly about the way it handles tonality, especially digital BW(I have silver EFX pro and I feel it doesn't do that fantastic of a job - better than nothing though. the film emulation plugins don't work too well)