Well.. Cars burned me real bad when it comes to Pixar.. up until this point i adored their movies. They were unique, had their own style and their own story to tell.
They had a heart.
With Cars Pixar made a run of the mill, paint by number movie any studio could have produced.. like the ones from Dreamworks or any other animation studio that relies on big names to voice the characters and promote the movies.
I thought the first Cars had tons of heart and character. I was resistant to the concept at first like everyone else, but the great storytelling very quickly won me over (much like with Ratatouille).
Unfortunately the sequel ditched all the quiet character stuff and became just a wacky saturday morning cartoon.