I am fascinated with movie trailers. YouTube has many, so just type in "trailers March 2019" and most everything that is a new or expanded trailer will come up. At two minutes, even the worst movie can be presented. Your only skin in the game is time, and in this case I can watch trailers for hours at a time, given the chance. I get hungry, tired, have an endless "to do" list, and other than that I'm hooked. Unless I put a list in front of me of what I should be doing, it's tough to let go.
What is your obsession/rabbit hole?