I always wanted to see the 1926 version. It would have been cool to see a Gatsby movie actually made in the Gatsby era. Don’t know if any copies actually survived.
According to what I’ve read, the only footage to survive from the silent version is this trailer-
http://www.youtube.com/watch?v=Asajgm-ciWA
I would like to see a production of Owen Davis’ stage play version. Or at least get a copy of the play to read and compare to the book and the other film versions.