Got RetroArch setup and working, got a controller, got PS2, N64, SNES emulators currently but likely get all old systems at some point.
Recommendations for games you found worth goong back to?
You don’t have to limit yourself to old games if you don’t want to. If you’re into Pokemon there are some pretty good Romhacks out there. I liked Unbound a lot and I’m playing Liquid Crystal at the moment.