Neither is my favourite system. But if I would have to choose one, based on its impact, I would say PS2. The system was insanely dominant during that generation, and it also established the first generation where games still hold up as they are, IMHO. The open world design philosophy also had it's major 3D breakthrough, something that still takes up most people's time til this day.
That said, I probably did spend more time with the Switch, as I got it first year while I got a PS2 after the release of the PS3.
Vote the Mayor for Mayor!







