There's a meme on Facebook in which people are encouraged to take a quiz of the general format
Which [object/ person/ thing] are you?
A quick scan of my Facebook page reveals that my friends have inhaled deeply of this stream of trivia, rating themselves alongside characters in Star Trek; evolutionary biologists; Britpop bands; world leaders; female characters in Japanese cartoons; chemical elements; classic novels and (gasp) eukaryotic organelles. And all that since the weekend. I have forsworn this particular delight. However, I know which quiz I'd take ... because, in my line of work, I already know the answer.