To make this more interesting I'm not including backwards compatibility in this. The PS2 doesn't need the help. So this will be things like specs, video game library, and things of that nature.
What's your favorite PlayStation System? I have to give it to PS1. It was my second video game console ever and introduced me to Monster Rancher, Crash Bandicoot, Spyro, Final Fantasy, Metal Gear, RPGs in general, Evil Zone, Armored Core, Resident Evil, Tomb Raider, and a ton of other games that made up my childhood. Needless to say there's a reason the first twenty reviews I ever did was PlayStation games.
Your turn.