I think old school gaming in general was simpler and more enjoyable/to the point. I have most nostalgia for PS1 stuff, but I really like a bit of everything

40GiB of game ROMs of all sorts. A ton of snes/megadrive oldies, some PS1 stuff.

Now I want to expand to Wii and Gamecube…

yes

Are you thinking of a mobile app or something else, like fully separate hardware you’d carry around? Sounds interesting