If I see something that's obviously a puzzle (like Sudoku), it bugs me until I solve it. (Okay, maybe not Sudoku, as I've seen a few of those.) There are actually competitions (mystery hunts, if you will) that involve solving many types of more complex puzzles. I'm not really involved in that community any more, as there are many puzzles in the real world that are more interesting to me.
Books: Cory Doctorow, Terry Pratchett, George R.R Martin, Neal Stephenson, Jared Diamond, Malcolm Gladwell, ...
Music: Christopher Tin, Nobuo Uematsu, Schubert, Spotify rock radio channel
Food: the tasty kind