I LOVE the PS1. Easily one of my favorite consoles. I have over 100 games for it. (I know that's small potatoes for some people here, but that's one of the largest game libraries I own for a console, I'm not a complete library guy, I just buy what I want to play.) The only console I have more games for is PS2 (and that's just because GameStop was clearing a LOT out in my town when they were no longer accepting them).
So many good shoot-em ups (Einhander, Thunder Force V, G Darius, RayStorm, etc.), RPGs (Final Fantasies, Legend of Dragoon, Legend of Legaia, King's Field, etc.), platformers (Spyro, Crash Bandicoot, Pac-Man World, Gex, Rayman, etc.), and just unique games like Twisted Metal, Bushido Blade, Intelligent Qube, and others.
It is damn underrated in 2020, because so many of the kiddies that didn't grow up with it just look at it as "that crappy 3D graphics console". They don't understand the innovation that this console brought to the game. Everyone, companies big and little upstart companies, were experimenting with 3D graphics. Trying to find what worked, and what didn't. And that bred innovation on a level that we simply haven't seen since. Some of it worked, some of it didn't, but it was all very interesting and you were never bored.
3 cheers for the PlayStation!