I'm going to have to take the side of the "Toy Story" kind of animation here. While classic anything will always have sentimental and historical value nothing beats the dimensions and detail added to animations now the Pixar generation has surfaced. Toy Story, Cars, How to Train Your Dragon, etc....
I was watching a old HeMan cartoon while visiting Crystals dad and I couldn't believe that I actually enjoyed that as a kid. Kids are so lucky and spoiled with the technology they have.
I like them both but I love the old way as far as a cartoon goes,as far as big budget films such as Transformers or Avatar Computer animation is great.