I have thousands of posters. I have 25 drawers of flat files in use at the moment. I have some choice posters too. I buy posters that I forgot I had. I buy duplicates just for the hell of it. For me, it's not so much about seeing them, as the hunt. Once I have them, the excitement is over. Until I see them again and realize I have it. I flip through them but I know what they all look like - that is one of the reasons I bought them. Don't need to see them on a daily basis. I have 20 or so framed but have only switched out my US OS frame about 4 times in the past year. For example, my biggest purchase of the year is still in the box it came from EMP. I do hope it is in there. I do plan on getting it framed - but no hurry.
I think you can separate movie poster collectors to better fit into one of two categories:
Those that buy to decorate (and show off)...
and
Collectors of cinema history...
I enjoy the thought that the poster I am buying most likely was seen by hundreds of movie goers just as much as the image. In a way a paper time capsule. Posters of different ages and formats all have a story. The availability of accessories changed over time. Actors/Actresses featured on the poster all have a story. I collect a lot by actor/actress... Each film has a story. I collect by film. I do select some of the posters based on art, but more for which one is the best for that film or features an actress the best.
Price/value only comes into play 1. If I want it. 2. Whether I can afford it.
I buy cheap shit because not everything for an actor, actress, or film is expensive. I just picked up, last night, the Mrs. side or "Mr. and Mrs. Smith" because I think Angelina Jolie was smokin' hot in that film. Was it cheap? Yep, and thank god I didn't have to shell out a bunch for it.
As far as I am concerned if you aren't collecting what I like, then "you" are collecting crap.
Japanese monsters - Crap. Universal Horror - Crap. 30s stuff - Crap. 40s Serial Westerns - Crap. Marilyn Monroe - Crap. All Hitchcock w/o Grace - Crap.
Plus I think that tastes shift. I never thought I would ever eye Spielberg posters, but I have softened the more I have learned about him as a director.
I think the question that should be asked vs. this narrow minded attempt to justify a specific way of collecting, is simply - "Why do you collect?"
Which is not a new question:
http://www.allposterforum.com/index.php/topic,3125.msg47323.html#msg47323