Here is a short list of films I never got to use (this is not meant to be an exhaustive list, I'm just listing the ones that I would like to have tried):
Ektachrome 320 Tungsten
Polaroid Type 55
And, the real subject of this post:
Scotch 1000 ISO? E-6 film, which reputedly had very attractive, "impressionist" grain structure.
If anyone has suggestions about imitating the Scotch E6 film, i.e. a high-speed color film, either E6 or C41, that gives noticeable grain, I'd love to hear ideas. Would pushing a normal E6 film to something way beyond reasonable (say from 200 to 1600) produce similar results? I rarely use color film faster than 200, except for the periodic roll of Fuji 800 C41, and my experience with pushing color film is limited.
Of course feel free to list your own "never got to use" films (or papers for that matter)!