and i haven't even started the state deductions yet.. awesome
Why do you feel lucky? It was always your money to begin with. It just means that government has been holding it for almost a year whereas it should have been in your pocket collecting interest, invested or spent by you.
Please if nothing else remember this: the government can't give you anything simply because they have nothing to give. What they give to one person they have taken from someone else.
The government didn't give you any money in that refund check. They simply are "allowing" you to keep a bit more of the money that they confiscated from you during the year that YOU YOURSELF earned.