Tough question. PS1 was my childhood and PS4 currently hits all the boxes but Id have to say PS2. It felt like theres trillions of quality games on it.
The PS1 era was such a great time. Its games may have aged the worst, but it provided experiences so different from everything I had previously played.
That, along with a few huge N64 games, really altered the possibilities more than any other generational leap before or since.