Originally posted by twilhelm Wpresto really summed it up. On the other hand, I shoot 4 formats. I have several apps-c bodies, including the K3, and I have the K-1, plus several (many) 35mm bodies and I’ve started with medium format recently. In my opinion, they all have their place, but the K-1 is really a stellar camera, especially with landscapes and weddings. You’ll get a lot out of those old lenses that you didn’t know they were capable of. I’ve had a few ready for sale, until I used them on the K-1. And in truth, I haven’t really noticed the “bulk” over the K3.
I would never gainsay someone who wanted to work with film. There is a psychological engagement with an image when you've processed the film, worked in darkroom cropping, fiddling exposure, dodging, burning and got your fingers wet in chemicals that you've mixed from powders. Done all that and spent more time doing it than I care to remember. But if you have to go with one system, the vast, vast majority of us are far better off with digital.
BTW: Do you digitize your film images for posting here on PF?