The mermaid with the hook is cool. (And sorry, but the cow made me think of the song "I am Cow" by the Arrogant Worms. XD)

Funny, I was just thinking about how the animation for Toy Story has aged until now too. The quality of 3D animation is so much better now than it was then.

The first series that comes to mind for not aging well animationwise are old 80s cartoons like He-man or Thundercats. Some, just don't age well.