While you might mature more moving out, I advocate staying home as long as you can without overstaying your welcome. Being able to save as much money as you can when you are young will have HUGE benefits later in life. Especially if you have things like school loans that you can pay off quicker because you don't have to pay rent. You just get start off on such a better footing. I couldn't imagine the headache of trying to pay for living on my own with the job I had after school.
I moved out at 22 about 11 months after graduating from college, and a month before getting married. Seven months later I had a better paying job so life was much better.
2003 Black SLE-Stock
2000 Mercury Mountaineer
1968 Oldsmobile Cutlass Convertible-455 cubic inches of muscle