sleep deprived insomniginger

why is it that i can stay up till 3:45 a.m. and still pop up somewhat fresh by 8:30 a.m. ready to start the day? i've always been a night owl and loved being the last person i know to go to bed, but when does it catch up to me? will it ever? when it does, i'm in for a rouuuugh transition to the real world. i work better when it's late and much worse in the morning. i hope i can keep this up till i'm 40.