TOD: My main collection is my soundtrack albums on records (45s and 33 1/3s) and CDs. Compared to others I know in the soundtrack community, my collection is modest (around 2,700 CDs and LPs), but it represents what I consider good to great film music. Since I can't possibly see every film for which a soundtrack was issued, I'm certain there are plenty of titles I don't have that might be considered great. On the other hand, I can't possibly listen to what I have completely through for what is left of my lifetime, so it's a "reference library", of sorts.
Next comes DVDs and Blu ray discs....and the DVD-Rs I burn from TCM showings, etc. I have several thousand movies on DVD/Blu Ray (sad, to say) and about 1,000 DVD-Rs.
My memorabilia collection consists of 8 1/2 X 11 movie stills, 11 X 14 lobby cards, posters (inserts, half-sheets and one-sheets), window cards (both Broadway and movie titles), presentation mattes (miniaturized stills/lobbies with autographed cards of key actors from some of the represented films -- includes an Arlene Dahl on a matte for "Journey to the Center of the Earth:), movie souvenir books, selected souvenir books from musical plays, and a jumbled assortment of signatures of movie stars, movie composers and Broadway notables.
Among my prizes: window card for "Mack and Mabel"; autograph, with a music notation, by Erich Wolfgang Korngold; a signed contract by Alfred Newman with Sam Goldwyn for scoring "Wuthering Heights"; a signed contract by Hugo Friedhofer for scoring (IIRC) "The Bishop's Wife" (although it might be "The Best Years of Our Lives"); a signed contract by Jerome Moross for scoring "Huckleberry Finn". I have a stage-used artist's palette used in a performance of Baz Luhrmann's "La Boheme" signed by "almost" everyone in the production on stage and off. I have a one-sheet for "The Lord of the Rings: Return of the King" signed by all cast members, production staff (key folks), including Howard Shore who scored all the films. Among my stills are two color British ones from "The King and I" signed by Deborah Kerr; I have a separate color still from "The King and I" signed by Yul Brynner; a Black-and-White still from "The Way We Were" signed by Streisand and Redford. In my record collection, I have a "Hello, Dolly!" autographed by Carol Channing and Jerry Herman.
Some curios include bronze MGM Lion paperweights (complete figure of lion) with "You Are My Lucky Star" inscribed on one side. MGM used to send these out to distributors, etc. I have four of them. Also, a very unusual glass representation of the 20th Century-Fox logo...yellow/gold glass. And, not last or least, an art deco (style) lapel pin of the MGM lion.
All of the above is a key to why I'm not yet retired and why I'm working on a third retirement income (including Social Security).