I agree with the the Oracles/Wind Waker cut off. I definitely don't think Zelda games have gotten any worse or better overall, but they definitely have a different vibe starting at Wind Waker. Maybe the distinction comes from the stories becoming a little more character based and cinematic. Then again, it might simply be a matter of different graphical styles. Everything before Wind Waker looks a lot more retro to modern eyes than the games that came after.