PS3 is still good.
PS4 not so much, but I don't think the whole concept if "giving away new-ish games" works very well on new systems. PS3 had the advantage of launching with a huge backlog to choose from.
Platinums: Red Dead Redemption, Killzone 2, LittleBigPlanet, Terminator Salvation, Uncharted 1, inFamous Second Son, Rocket League