I started playing RPGs in 1982 with the D&D Basic Boxed Set.  I quickly moved into Top Secret, Gamma World and Star Frontiers, all the old school boxed sets.  In the last 40 years I acquired over 150 different role-playing games and have tried about half of them in actual play.

I have a great deal of nostalgia for the Top Secret game as I enjoy the genre of Cold War espionage.  Not so much 007 as movies like Tinker,Tailor, Soldier Spy and the feel of what Atomic Blond was going for.