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.