1. Bills
  2. Taxes
  3. Having to go to bed at a reasonable hour
    In theory.
  4. Working
  5. When the bands you saw in concert during your high school years are old enough to qualify for the Rock and Roll Hall of Fame
  6. Zits and grey hair simultaneously occurring
  7. Bills
    It deserves two mentions.
  8. Realizing that when the situation calls for an adult, people are turning to you.
  9. The first time you use the phrase 'when I was your age' and realize you have become that which you hated in your youth.
  10. Redefining your opinion of what qualifies as an 'adult.'
  11. Reboots of your childhood favorites