Of these three I've only played Ratchet & Clank Future, but it is definitely an excellent game and I agree with everything you said.  Surprisingly enough, it is actually one of the reasons I picked up a PS3.  The Ratchet series hass very near and dear to me ever since I picked up the first one many years ago, and is easily my favourite platformer - yes, I like it even better than LittleBitPlanet, and that's saying something!