Actually, it's not that much film to stock and pack (assistants ). And, yes, I do use them all, sometimes in the middle of a shoot. (I will sometimes shoot only a few frames, and wind off the rest of the roll.) Keep a pile of A12 backs around for the purpose.

If it was one color, one BW, it'd be Panatomic-X (665) or FP4 and NPC. But, that'd never happen, so I shoot what is the correct tool for the correct time. If the time changes, so does the tool. But, those are the ones that I can adjust like crazy and somewhat meet the specs of the other films...

NPC for color, but if slide were more practical, I'd shoot provia 100F more often. However, since I do my own Ciba work, it's not THAT practical...(spend 1 out of 10 hours actually shooting and the other 9 doing darkroom work is definitely NOT practical&#33

BTW, the UC vs Ciba line is meant to say: NC=nearly crap, VC=very crappy, UC is better, but the colors and quality of Ciba'ing a Provia slide blows away any neg film...