cue Skyjedi Lowry/Bond release rant in 3... 2... 1...
Anyway I find film grain to look pleasing but I would hardly ever call it a plus as part of a movie. It's something that either is there or isn't, unlike a style of cinematography or plot which can change mid-movie. Doesn't make/break it for me, although as I said I would prefer it. I don't think I'd be able to articulate my view in much more detail without being easily contradicted, though, so excuse me for not elaborating.