This is beautiful...love the tones..love the movement and LOVE the grain... but that's a matter of "taste" I guess. I have often purposely used grain as an artistic touch...not that I'm an expert or anything...wonderful work.
This is a little grainy for my tastes. I'd recommend either shooting at a lower ISO, or once you convert from film to digital, running this through a filter such as Neat Image to reduce the noise.