My first videogame memories were on the Atari 2600 (yes I'm ancient lol). I remember playing stripped down versions of Pac-Man, Donkey Kong, Jungle Hunt, among other arcade classics and loving every minute of them.
Next was Commie 64, where I was floored with Defender of the Crown, and more than amused with this little game called Forbidden Forest... *giggles* it was the first overtly violent game I played, and it was so gruesome it was hilarious. And the music was epic. Games like Neuromancer and Impossible Mission("Stay awhile... staaaay foreeeever!") rounded out that era for me.
Then with the SNES I was introduced to the awesomeness that is the classic JRPG. And yes, they really DON'T make them like they used to. Final Fantasy 4 and 6(2 and 3 in the west, at the time), Chrono Trigger, Illusion of Gaia, Secret of Mana... my goodness those were some good years of gaming. I am still trying to forget Secret of Evermore, though. *shudders*
I guess the last era I would consider as more nostalgia than modern gaming would be the early 3D consoles, such as N64 and PS1. And the Sega Saturn, although the 3D was meh at best, it had some of the best games of the time, imo. Panzer Dragoon Saga, Dragon Force, Astal, Virtua Fighter 2, Fighters Megamix, Guardian Heroes... I really could go on, and that was just the Saturn. Twisted Metal blew me away at the time on PS1, as well as Suikoden 1 because of the music, and Wild Arms 1 as the first rpg with 3D battles(nope it wasn't FF7 lol). WA1 had an amazingly awesome anime intro as well.
Damn... I could probably go on but that's enough nostalgia-gasming from me for the time being, lol.