Personally, my favorite question was this submission from Georgia Tech for ACF Nationals 2013:
Why it made my day: I like that this question included some clues at the beginning to reward people with field knowledge, then moved on to clues accessible to laymen. It also features plenty of Lewis Mumford-style middle clues about the history of technology and tools, which I think quizbowl often elides in favor of questions about abstract ideas. It's also not fraudable from playing past packets, while being incredibly accessible by the end. It rewards many different types of knowledge--you could answer this from learning about anthropology, archaeology, the history of technology, the history of early civilizations, etc, instead of requiring knowledge of one incredibly focused topic.Carol Kramer claimed that this invention was a major reason for the decline of matriarchal societies because it was almost exclusively used by men. Jerolyn Morisson and Douglas Park analyzed the success of this invention by studying notches in the walls on Crete. Techniques called jiggering and jollying were frequently employed by people using this invention. Unlike the Yangshao culture of the Yellow River valley, the later Longshan culture employed this invention, which it used to create “black” items. In the Western Hemisphere, a technique involving beating large coils was used instead of this invention. Early examples of this invention included the tournette, which was gradually replaced by the “kick” or “fast” type of it. A triangular support was placed under one of these devices, which functioned by rotating a large stone. For 10 points, name these devices that were used to “throw” clay in order to form ceramics.
ANSWER: pottery wheel [or potter’s wheel]
Not only that, it's written in clear, readable English without meandering clauses. The sentences have a natural rhythm, and while not being too abrupt, stop at the end of every major idea instead of continuing and straining the breath of moderators.
Social science, especially anthropology, can be very difficult to write; for some packet-submission tournaments I edited, no teams submitted any anthropology or archaeology questions. Not only was this a usable question, saving me the time of writing a replacement tossup, but it was on a really interesting and accessible topic. It absolutely saved me a ton of labor and energy, and put a smile on my face and a song in my heart.
To this day, it's my favorite question.