These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Robert Zemeckis
Uncanny Valley: Mainly in Polar Express and Beowulf; many audiences felt the (then brand-new) motion capture tech couldn't quite create a realistic image. The conductor in Express is almost a Trope Codifier.
Win Back the Crowd: Flight after the increasing negative of his motion-capture films. Critical consensus of it was overall positive.