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.
What The Hell, Casting Agency?: For a part of a Puerto Rican in a musical, a Russian-American was cast, who couldn't sing (okay, Natalie Wood actually could sing, but she wasn't good enough for this movie).