I can't stand the Pentax 645. Operates like a microwave oven out of the 80's and sounds like tearing velcro with every shutter release.
Never liked it much either. I checked it out at a dealer when it first came out, and was underwhelmed. The controls and the dim viewfinder with the notch out of it just turned me off. The 645n is much better all around, IMO.
I do use a digital device in my photographic pursuits when necessary.
When someone rags on me for using film, I use a middle digit, upraised.