I was born in 83, and the systems from my childhood are NES, Genesis, GameGear and PlayStation. I dabbled in the Atari at the age of 4 but thre's no nostalgia there. Too old a system for me I suppose.
Anything after that I bought as a collector/adult and while I enjoy newer games, it's just not the same as going back and playing a childhood favorite. Course the same can be applied to "new" PSX games I pick up. It's also fun to go through my collection and pick out which games are my "originals". You can always spot em from the fucked up manuals. :P