When I was little, I knew when my mother got paid. I'd ask for money, she'd say no and say that she didn't have any money. I'd say "but you just got paid!" Mama, I so understand the meaning of that now
The fact that I have a budget makes me feel grown. In school, I would just buy that new outfit without thinking twice, now I have to look in my checkbook to make sure I can afford that outfit. Paying my rent is more important than new clothes anyday...
Other stuff:
My 9 to 5 job
My business cards
When I go home to visit and stay out a little late, my folks don't question me.
I don't have homework anymore, I can watch all the tv I want cuz I don't have to study.
To all the college students who can't wait to graduate: being grown is very OVERRATED, I do miss school sometimes.