I would say Atari but that’s just low-hanging fruit because it’s a generation I never really got to play as it was before my time. But I am starting to fall out of nostalgia for the NES which is held dearly in a lot of hearts of retro gamers and gamers that have enjoyed what that system had to offer for a few decades.
I know it had offered a lot of classics and gave so many games their start, most of which are still with us today like Final Fantasy for example.
The best guess I can give about why I don’t care as much about that generation is because it is very oversaturated when you start entering the world of retro gaming. For retro gaming I prefer SNES and Genesis, because I technically did start playing those when I was born and they were first released. So I have more favorability towards those than the NES and generations before and during it.
The ps3/xbox360 era - despite it being during my most “formative” gaming years, I feel like there was a lot of “samey” game design. Theres a similar issue at the moment, to be honest, at least in the AAA space, but indie titles might make me look back with nostalgia on this era when its old enough to be nostalgic.