Every year for a few months (November or December or January through the beginning of March), list50 accepts full 50-item rec lists AND shorter minilists (10, 15, 20, or 30 items each). I started out with lists of "extras" cut from larger lists, and then progressed to weird/rare/specific, like "death" or "the prompt Wicked" or "bandom GSF" or "sex toys" or "stories about gender".

It basically encompasses my most productive period, because I'm usually struggling to hit some goal before the end of the challenge (also the comm's anniversary).