Wow. Don't know how I missed this thread. Nice shots and kudos for going the manual route.
I actually use a few Pentax screw-mount lenses with my Olympus E500 (haven't bought a Nikon F adaptor for them yet).
Still, my favorites are my Pentax-Asahi ME, Sears KS-2 and Mamiya RB67 which are 100% manual. Heck, the Mamiya doesn't even meter on its own.
I recently got myself all set up for developing colour and B&W negatives at home so it's not even necessarily expensive or inconvenient to shoot film over digital. To be honest, none of my digital cameras have been charged or used since I acquired the Mamiya and the darkroom chem.
2006 Toyota Matrix XR
1995 Saab 9000CSE 2.3T
1986 Jaguar XJ6 Vanden Plas (GM Drivetrain Conversion)
2001 Buell P3