I own every Ratchet game except the second PSP one and the PS2 port of Size Matters. After Quest for Booty I got sick of the same old same old. It's like Insomniac has a piece of software where the select options in a wizard and it pops out a new Ratchet game. They need to do something new.
Yeah. Aside from adding weapon levelups, the series has been virtually the same since the second one. Hell, my favorite was Deadlocked simply because it tried to be different without journeying to a shitload of planets, talk to stereotypes, see the plumber, play a dumb Captain Qwark minigame, upgrade the wrench and look, its over.
Jak changed genres with virtually every game. They actually tried to improve it.
Hell, they haven't even brought back Multiplayer! I could excuse it for the first one on a new console, but leaving it out here is criminal.