As you have read on some other recent threads, just this week, I decided to go all film. I'm old enough to have had a 110 Instamatic, Pentax compact 35mm, and a Minolta SLR, which I used on up until 2002. However, they all served as point & shoots; no idea what f-stop meant, or for that matter, focal length, certainly no messing with aperture priority let alone manual.
When I decided to actually pursue photography as a serious hobby, I learned all of the fundamentals as a prerequisite to buying a 350D, which I have used since. The convenience of digital was so prevalent, that film suddenly seemed so anachronistic as to predate my existence. I never dismissed the quality, of course, but film suddenly seemed so costly and largely unforgiving, that is, no histogram to quickly check for correct exposure. The instant gratification of digital alone appeared indispensable.
However, as I convert all of my photos to monochrome and shoot mainly urban and street scenes, I was continually missing an affordable digital rangefinder. Plus, like you said, I just couldn't get the grain in Photoshop; and I felt increasingly awkward about adding it artificially. So just this month, I decided to give film a go, and picked up a Bessa R2M. For the past year, I've only been using manual focus primes on the 350D, so tossing out the automation was not an issue.
I also bought a Nikon Coolscan V ED, and while I'm still a novice at scanning, I was not only pleased to get that grain, but I was also impressed with the depth of some of the Bessa shots---and it's a depth that manifest in digital, not just on silver halide prints (though I realize the print's quality would be even better). So this week, I decided to go all film, and my EOS Elan 7NE is currently en route from B&H to Tokyo (for whatever reason, the camera here (EOS 7s) cost about US$400 more). I have three Zeiss manuals to use with it, and it's a very inexpensive way to go "full frame," which I was planning to do digitally later this year or next. Perhaps it was a sign that the 5D's upgrade did not appear earlier this year, as expected.
Now, I just need to learn how to develop negatives..and then the Holga….