90s for me: 90's era web design, frames, pre-CSS styling, blink tags, under construction gifs; TI calculator games; original Duke Nukem, original DOOM; ring pops, scrunchies, slap bracelets; dial up noises, AOL, getting a 2nd phone line for Internet or getting someone off the phone to chat with friends on AIM / ICQ; "parents" generation (though not my parents) not knowing the difference between the Internet and AOL; Palm Pilot V, HP palmtop (and other mobile devices without Internet Access)
I was born in the early '80s and it surprised me how much nostalgia was generated inside of me by these photos taken at the 1984 Sarajevo Winter Olympic Games: https://www.facebook.com/pg/muzeulcineastuluiamator/photos/?... (warning: FB link). It's the haircuts, the look on people's faces, their attitude, hard to describe in words, they all remind me of my first memories as a child and especially about how I was looking at my parents.
> retro games pre/post crash
I've heard a few people discuss a games market crash in recent years and was very confused as I lived through that era and didn't remember anything of the sort. It was only recently that I discovered those discussing it were all American - turns out there was a "crash" of sorts but it was very localised to the US. Those of us in the rest of the world still had a thriving gaming scene. Particularly in Europe and Japan (I cannot speak for other areas with any great certainty).
80s - hair metal, synthwave/synthpop (think hotline miami, vice city, etc), retro games pre/post crash. all in the 8 bit c64/atari color palette.
90s - grunge and the internet revolution. i think we still need some distance from the 90s to really define the nostalgic points, but a lot of the last few years is undoubtedly swallowed in the new millenia hype.