Sonic the god damn hedgehog. Seriously, the only good games he ever had were on the Sega Megadrive, now the games just suck so badly I can't even look at them.
Even though I'm a big Final Fantasy fan, I think they should stop making them, why? Because they keep making pointless sequels and prequels to the original games like VII; VII was fine on it's own, I don't want the next generations playing the new versions of the game thinking they know everything about the game, because they don't.
Square-Enix should start making some kind of New RPG, or at least change the name.