When they used to have 'unknowns' for voices
Except for robin williams of course and a few familiar faces.
I miss back when animated movies used to have relatively unknowns for voices, I prefer it this way. I found it distracting watching Cars because all I could see was Owen wilson's face, same for a shark tale, king fu panda, toy story etc. I think the only time it worked for me was Shrek because mike Myers and Eddie Murphy were perfect together.