You showing love to Jak and Daxter makes me far happier than it should...The series needs comeback, stat...It'd have to be between PS1 & PS2. There were so many great games on both it's tough to choose. A lot of my favourite series started out on PS1 like Resi, Tomb Raider, Tekken and Crash Bandicoot. But then PS2 had God of War, Ratchet & Clank, Jak & Daxter, SoTC and Final Fantasy X!
The good thing is all of the classics are available on PS4