None of the above!
I shot Plus-X, Tri-X, Ektachrome 100D, F64D (the only Fuji film I have used), 250D, 200T, and 500T!
I can get all this stock and get it processed locally for reasonable rates with same-day turnaround. Not true for Kodachrome. I also prefer the color response and contrast of Ektachrome and the color neg. varieties I tried. Kodachrome does have its "look", but I prefer these other films.
I do have one roll of Kodachrome 25 standard 8 sitting here. It expired in 1979. I'll shoot it some time and see what happens.
Has Kodachrome 64 been discontinued as a motion film?
My main use of motion picture films has been:
1. shooting performances; mainly for friends (this is where the Tri-X, 200T, and 500T were used - then scanned and AVID)
2. "experimental" projects that are far closer to still photo work than film work (mostly Plus-X and Ektachrome 100D - usually a mix of in-camera editing and manual splicing, and projected)
3. required school projects (F64D, 250D, 200T, and Plus-X - then scanned and AVID)