PS1. If I was limited just to its games, it would still take me years to beat half of its library (I love you, JRPGs and Strat RPGs, you glorious time sucks), and the hardware would still inexplicably be kicking after those years with proper care. I feel like I could blitz through the N64 library fairly quickly because of a focus on platformers/shooters, and the 360 had notorious hardware issues.