My collection of stuff is sort of a disrupted pack-rat pile driven by conflict between forced moves and sentimentality. I've somehow managed to keep fragments from the sidewalk in front of my childhood (early '70s) home, but I've misplaced or discarded more than a few things I'd still like to have easily at hand, including nearly all of the pre-CD software I once had around.
The titles that've defined my gaming taste since the early '90s are Civilization, SimEarth, Master of Orion, SimCity, and Master of Magic. I'm still waiting for the truly lovable love-child of Will Wright and Sid Meir. Especially if said child can do quick changes between science and fantasy motifs.
Also, I wish there were more calls to try for a spiritual successor to Alpha Centauri. The fact that the modern Firaxis hasn't tried is yet another sign that they don't really deserve to own the Civ legacy. I have no idea how much to blame or sympathize with Sid Meier for the situation, but I'd probably collect cans and bottles to pay for what looked like a decent chance at Alpha Centauri: The Galactic Arm, or whatever the marketers decided was a good name for AC2.