I have the usual computer collection (tons of PCs, one in working condition, similar collection of laptops); my Amiga fix (when I need it) is handled by WinUAE.
On the non-computer side I have a bookcase full of pen and paper role-playing games, the crown jewels of which are a set of Original D&D rules (specifically one of
these) autographed by Gary Gygax and Dave Arneson, plus a bunch of cool boardgames (a 2nd edition and the much rarer 3rd edition of Space Hulk).