When creating your first budget after college, don't make every dollar accounted for (ie in your rent, car payment, student loan, health insurance, cable/internet, life insurance, etc). Leave yourself a recreation budget because you will want to go out and reward yourself after being a broke college student for so long.
Also, you may have unexpected costs that arise that you weren't planning like car trouble, medical bills, broken appliances, etc. And the last thing you want to do is ask Dad for money again.