Funny, I was just listening to Bowie as I read your post... "Put on your red shoes and dance the blues," MrDancer.
Welcome.
Our collecting criteria are all different. To me above all I must have seen the movie. It could be the most striking design, if I can't associate it to a flick, it means nothing and I pass.
As a graphic designer, I'd be very interested to know your go-to poster designers, and/or directors (Kubrick, for instance, was hands-on and not a single poster didn't meet his approval).
T