1. Karaoke
    I keep song titles in a note, and I can't stop adding to it.
  2. Vacuuming
    Especially when you can hear the dirt/random objects rattling up the tubes into the catch-all. Also, emptying the dirt and dust into the trash.
  3. Going to movies alone
    No sharing popcorn, no post-movie recap, just sit and watch and process.
  4. Shucking oysters
    I love eating oysters, but it's so satisfying to shuck them. That little pop when you get the shell open is almost as rewarding as the oyster itself.
  5. Unexpected song covers
    Shuffling through a playlist and finding a familiar song title done in a completely different style thrills me.