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: Twenty One Grams
He Really Can Act: Naomi Watts is the most surprising of the trio (Having mostly done small projects beforehand) but Benicio Del Toro arguably gives the best performance (He had already won an Oscar so whether it counts is up for debate).
Tear Jerker: Many moments but Christina's plea for Paul to help murder Jack stands out.