Well I just finished an enormous, expensive project that lasted 6 years for a book on Kodachrome, my first project ever. And now I have three projects for books going on at the moment, all on film.
One will be done in three years and is on a not so well known but utterly spectacular canyon here in Colorado, lots of landscapes, 5th class big wall climbing, fly fisherman, historical, ranchers, etc.
Another is a book on fresh water underwater aquascapes, lots of time exposures, special gear. Probably a 2-3 year book project.
Then there is a very long term project that has essentially been going on for over 13 years and has 12 more to go, a 25 year retrospective of my work in Aspen. I shoot images for it nearly every day in conjunction with both what I like to shoot for regular clients and then people work using my M6, 35/2 loaded with Tri-X. In the past two weeks I have secured a local publisher with serious long term interest and other funding since no one else in my photo-heavy town is even bothering to do such a thing.....I am the only photographer in town that I ever see carrying a camera everywhere.
I spent the majority of my career doing photo essays and multiple day magazine pieces but never really long term projects. Now I can't imagine not doing them, they keep me sharp, connected and very inspired.