Finding Nemo was the first Pixar film to actually have an adult storyline - with minor modifications, the script would have worked just as well with real live people.
But they would have drowned.
Personally, I never really got the hubbub about Finding Nemo. It went something like this:
Dad: "My son is missing."
Random ocean-life: "Oh, let me help you find him."
(sub-plot adventure)
Dad: "You're useless, but at least I wasn't eaten."
My favourites were Wall-E and Ratatouille, but for different reasons. Wall-E was touching and funny, and I loved how the characters could project their feelings so well with only gestures, and no coherent sentences. It's VERY clever.
I was pleasantly surprised that Ratatouille wasn't a total bust. I thought nobody would bother seeing a movie about a mouse who cooks, but even I was taken aback by some of the plot. It's funny as well.
Didn't like Cars or A Bug's Life. Didn't really think Toy Story 2 or Finding Nemo was anything amazing. I only saw The Incredibles recently, and again I was a bit surprised that it wasn't a bust.
And for all those Cars fans, they're actually making a sequel to that one

o), but after the next sequel to Toy Story.