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: Doctor Who 2010 CS "A Christmas Carol"
Cliché Storm: At its core, it's just another rehash of the Scrooge story. Only with time travel and sharks.
Crowning Moment of Funny: The Doctor explaining to Kazran and Abigail that they have to leave the party because he somehow got engaged to Marilyn Monroe. Kazran and Abigail, who have just had a very serious conversation the Doctor is unaware of, ignore him, driving him to go through with the marriage out of spite.
Doctor: Marilyn! Get your coat!
The Doctor's entrance via the chimney.
Doctor: Sorry, Christmas Eve on a rooftop, saw a chimney, my whole brain just went 'WHAT THE HELL!'
The psychic paper finally encounters a whopper so big it can't function; that the Doctor is a mature and responsible adult.
A little girl excitedly looks out of her window expecting to see Father Christmas on his sleigh, only to be confused when a shark pulling a hansom cab shoots past instead.
The Doctor continuously failing to do the "pick a card, any card" trick.
Rule Of Awesome: Pretty much every single element of the episode sounds totally stupid when you're trying to tell someone about it the next day — re-writing a person's life, a flying shark calmed by singing, etc, etc, etc — yet every single time, the result is so awesome it completely eclipses how stupid it might have been.